Minipet™ Pipettors feature a three-way check valve for continuous, repetitive pipetting. Just place the filling line in a reservoir, push the Teflon® plunger to dispense and release to refill. Molded polypropylene handle offers comfort for extended use Turning the knob on top sets the self-locking capacity to assure dispensing repeatability of ± 0.5%; extensions can be added to the filling line for greater reach Teflon® Minipet® Pipettors offer a high level of chemical resistance; may be used with virtually any solvent or acid (except HF); fluids come in contact with only borosilicate glass and Teflon®; Supplied with an all-Teflon® valve (with glass check) and Teflon® sinker on 45.7cm (18”) line, 2.4mm I.D.(?”) Aqueous Minipet® Pipettors are autoclavable and can be used with a Luer lock manifold for multi-well plate work; supplied with a chrome plated check valve, Luer lock fitting, Buna-N-seals, stainless steel spring, and Luer lock cannula, 45.7cm long (18”), 3.2mm (?”) I.D. silicon filling tube and Teflon® sinker TEFLON® is a registered trademark of The Chemours Company FC LLC and used under license by Bel-Art Products, Inc.