Tips are manufactured from the finest raw materials using precise production techniques that provide consistent quality performance. Primary products are made from virgin polymers and contain no recycled, reprocessed, or altered plastics. Natural, Polypropylene Low Binding Sterile TipStation Racked Volume Range: 1-200 ul Grad Lines: 10, 50, 100 ul Certified Human DNA Free Certified PCR Inhibitor Free Certified Pyrogen Free 960 Tips/Stack, 5 Stacks/Case