Office Products" /> Comes with 3-way check valve for extended repetitive pipetting Ergonomic PP handle for long periods of use Aqueous Minipet Pipettors are autoclavable and can be used with a Luer lock manifold for multi-well plate work Dispensing repeatability of +/- 0.5 percent (+/- 1 percent for 30ml) They are supplied with a chrome plated check valve, Luer lock fitting, Buna-N-seals, stainless steel spring, and Luer lock cannula