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A culture tube or test tube is a common piece of laboratory glassware consisting of a finger-like length of glass open at the top and usually with a rounded U-shaped bottom
Intended primarily for use in the testing of milk for the presence of bacteria by the methylene blue reductase test as described in APHA Standard Methods for the Examination of Dairy Products
Has a smooth, fire-polished top
Graduation line is located at the 10ml level; marking spot provided for ease of identification
Designed from ASTM Specification E982, Type II requirements