Designed for accurate and rapid fluid dispensing; these polystyrene pipettes are sterile, pyrogen free and utilize a unique filter plug to prevent overfilling. The filter plug eliminates lint fibers and ensures plug stays in place. The sharp, black, highly legible permanent graduations prevent ambiguity and guarantees precise reading and accurate dispensing to ±2%. Reverse graduations show volume removed or remaining on all pipettes larger than 1mL. Generous negative graduations provide additional pipetting volume.