"I purchased this column protector for an R& D purpose. This column has done what it was in..."

"Used for drug product research. Is suitable for research in our applications as we have or..."

"We recently switched our current method over from HPLC to UPLC. We are happy with our res..."

"Waters pre-columns work well at extending the life of the main column on our system. They..."

"We purchased this product few months ago and it worked great for us! "

"These columns are great and have a very long lifetime when properly cared for. They are p..."

"Very easy to install. Extends the column life a lot. We routinely using these guard colu..."

"Easy to install, extends column lifetime by catching the crud. Definitely cheaper to repl..."

"No loss of peak performance as compared to no precolumn use. Easy to configure to columns..."

"These columns are easy to use and are a great value."