Toxicity Tested - Rainin Positive Displacement Pipette TipsCapillary piston assemblies for Pos D and Gilson Microman positive displacement pipettes. Presterilized, pre assembled, 180 tips in 3 racks of 60. Rainin Pos D Tips come pre toxicity tested, evidenced to be non toxic to sperm by a UKAS accredited lab. Once you have validated our results in your own lab, youll no longer need to do in house testing of supplies saving time and therefore, money. To place an order, reach out to enquiries@hawksley. co. uk