Clinical Diagnostics Products & Reviews

The Corning® polypropylene pouring rings fit on the lips of PYREX® media bottles for drip-free pouring and are autoclavable at 121°C.

The red Corning® polybutylene terephthalate (PBT) high temperature caps have 3 holes with 1/8" OD tubing. No need to precut tubing to reach the reservoir bottom, just a quick quarter turn of the lock nut (from outside the reservoir) allows positioning of PTFE tubing at any depth. These delivery caps have a GL45 thread, can be dry heat sterilized at up to 180°C and have a Polytetrafluorethylene (PTFE) liner for efficient sealin…

The Corning® ethylene tetrafluoroethylene (ETFE) pouring rings fit on the lips of PYREX® media bottles with GL45 threads for drip-free pouring and can be dry heat sterilized at up to 180°C.

These Corning® orange polypropylene closures are designed for culture tubes and flasks with long rimless 25mm O.D. necks. Closure offers two positions: open for gas exchange or closed for humidified environment. Internal drip ring minimizes contamination. Closures are autoclavable at 121°C.

These Corning® natural polypropylene closures are designed for culture tubes and flasks with long rimless 40mm O.D. necks. Closure offers two positions: open for gas exchange or closed for humidified environment. Internal drip ring minimizes contamination. Closures are autoclavable at 121°C.

These Corning® orange polypropylene closures are designed for culture tubes and flasks with long rimless 40mm O.D. necks. Closure offers two positions: open for gas exchange or closed for humidified environment. Internal drip ring minimizes contamination. Closures are autoclavable at 121°C.

This 47mm fritted all-glass support base with tubulation is designed for assembly with either the 300 mL graduated glass funnel Cat. No. 33971-300 or 1000 mL graduated glass funnel Cat. No. 33971-1L.

These 125 mL PYREX® flat bottom boiling flasks have long necks with tooled mouths and take a No. 2 rubber stopper. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the toughest…

These 1L PYREX® flat bottom boiling flasks have long necks with tooled mouths and take a No. 8 rubber stopper. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the toughest lab…

These 250 mL PYREX® flat bottom boiling flasks have long necks with tooled mouths and take a No. 5 rubber stopper. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the toughest…

These 2L PYREX® flat bottom boiling flasks have long necks with tooled mouths and take a No. 8 rubber stopper. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the toughest lab…

These 500 mL PYREX® flat bottom boiling flasks have long necks with tooled mouths and take a No. 6 rubber stopper. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the toughest…

These 6L PYREX® flat bottom boiling flasks have long necks with tooled mouths and take a No. 11 rubber stopper. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the toughest lab…

These 250 mL PYREX® flat bottom boiling flasks have full length outer 24/40 Standard Taper joints on long necks. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the toughest la…

These 1L PYREX® flat bottom boiling flasks have full length outer 24/40 Standard Taper joints, but with shorter necks. They are carefully designed and manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and lo…

These 250 mL PYREX® flat bottom boiling flasks have full length outer 24/40 Standard Taper joints, but with shorter necks. They are carefully designed and manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results an…

These 100 mL PYREX® round bottom boiling flasks have full length outer 24/40 Standard Taper joints, but with shorter necks. They are carefully designed and manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results a…

These 1L PYREX® round bottom boiling flasks have full length outer 24/40 Standard Taper joints, but with shorter necks. They are carefully designed and manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and l…

These 250 mL PYREX® round bottom boiling flasks have full length outer 24/40 Standard Taper joints, but with shorter necks. They are carefully designed and manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results a…

These 500 mL PYREX® round bottom boiling flasks have full length outer 24/40 Standard Taper joints, but with shorter necks. They are carefully designed and manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results a…

These 5L PYREX® round bottom boiling flasks have full length outer 45/50 Standard Taper joints, but with shorter necks. They are carefully designed and manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and l…

These 50 mL PYREX® round bottom boiling flasks have full length outer 24/40 Standard Taper joints, but with shorter necks. They are carefully designed and manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results an…

With full length joints, but with short necks.The 100, 250, and 500 mL flasks are replacement parts for organic chemistry kits (Cat. Nos. 6949 through 6949K).

These 250 mL PYREX® round bottom boiling flasks have full length outer 29/42 Standard Taper joints, but with shorter necks. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the…

These 500 mL PYREX® round bottom boiling flasks have full length outer 29/42 Standard Taper joints, but with shorter necks. They are manufactured from No. 7740 borosilicate glass. Wall thicknesses are carefully controlled to provide the proper balance between thermal expansion and mechanical strength for greater shock resistance. Their excellent chemical durability results in contamination-free results and long life under the…