Using Gilson PIPETMAN Tips is the only way to ensure accuracy and reproducibility across the full volume range of your PIPETMAN pipettes. Did you know that tips contribute up to 50% to the performance of your pipetting system? PIPETMAN pipette tips are made of 100% virgin polypropylene making them naturally hydrophobic so you don't have to worry about coatings or treatments leaching into your valuable samples. To help prevent contamination, the 96 tips are loaded without manual intervention. Tipack racks are sealed with a security sticker, fully autoclavable, and robus Tipacks will resist being autoclaved several times.