These exact volume Samco Scientific® disposable transfer pipets are made of shatterproof, nontoxic polyethylene. Non-sterile and bulk packed. This exact-volume design provides quick, easy and precise pipetting. Squeeze the top bulb to draw the liquid up. The bottom bulb acts as a reservoir for the excess, leaving the exact volume in the stem. Simply squeeze the bulb a second time to dispense only the liquid in the stem. Dispense Volume: 150µL. Stem Diameter: 3.0mm. Length: 7.95cm. 5000/Case. Samco Scientific® #: 788NL.