Elkay standard pipette tips are designed to fit and function on a wide variety of single or multichannel pipettors. Manufactured from the finest grade polypropylene tips are tested for optimum fit, function and straightness. In order to reduce operator fatigue Elkay tips require minimal force for loading and tip ejection. Elkay racked pipette tips come in autoclavable racks with hinged or standard lid in 8 x 12 format.