Stack Racks are a high density storage and presentation format. As such they are ideal where work space is limited, for example in laminar flow cabinets. Universal fit Alpha Stack Racks tips are available in soft Low Retention polymer in 0.1µl and 1-200µl and in conventional polypropylene 1-200µl and 200-1000µl. Consisting of 2 stacks of 5 layers of 96 tips, except the 200-1000µl tips which are 100 tips per layer.As you finish one layer, you can quickly remove and discard it revealing a fresh layer of tips. All Alpha Stack Racks are autoclavable and are compatible with the majority of popular pipettes. In addition, we can now offer 24 x 8 format Stack Racks consisting of 5 layers of 192 tips. This offers you a larger number of tips per layer, for use with multi-channel pipettes.