Denville's disposable serological pipettes are ideal for tissue culture applications. Crisp, black, highly legible permanent graduations prevent ambiguity and precise reading and accurate dispensing within +/- 2%. Reverse graduations show volume removed or remaining on all pipettes larger than 1mL. Generous negative graduations provide additional pipetting volume. Denville's serological pipettes are made from transparent medical grade polystyrene sterilized by gamma irradiation. Each lot is free from pyroxenes (LAL-test: <0. 06EU/ml), RNA, DNA, RNases, & DNases and heavy metals. One piece construction limits leaks. RNase/DNase, pyrogenic free.