Kimax pipet calibrated to contain 17.6 ml of water (equivalent to an 18 g milk sample). A special rubber washer (supplied) supports the pipet in the neck of the test bottle. Grooves on the outer surface of the washer allow the air displaced by the incoming milk to escape freely. Scale is permanent brown stain. Made in accordance with specifications of the AOAC. Designed from ASTM Specification E1043, Type II A requirements and for use in AOAC/APHA test procedures where blow-out after drainage is specified.