Soft and Elastic Bulb For Easy Pipetting. US FDA Approved Grade Virgin Polypropylene Plastic Without Any Trace of Metals. Highly Transparent and Clear. Smooth Orifice For Precise Dispensing. Visible External Graduation For Accurate Dispensing. Certified DNase, RNase, Pyrogen, Endotoxin, Human DNA and PCR Inhibitor Free. Comes In Two Variants - 1mL and 3mL.