Pipets have a uniform pulled tip and are clean, plugged, sterile and ready for use. Calibrated to meet APHA requirements for making milk dilutions. 1.1mL size is also used for the milk phosphatase test. Packaged in paper/plastic individual wrap and overpacked in convenient dispensing shelf-packs for laboratory benches. Paper/plastic wrap gives the advantage of see-through plastic yet the easy tear-through feature of paper. Manufactured from 51 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class B requirements.