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Tubes and test tube screw caps are easily autoclavable
Enamel marking spot for pencil notations
Round bottom
Country of origin: Mexico
These PYREX Screw Cap Test Tubes include deep-form 13-415 GPI threaded phenolic test tube screw caps to facilitate handling and sealing after autoclaving. Screw caps are fabricated from a special formula resistant to the effects of temperature and steam in autoclaving and are provided with a glued-in, white rubber liner. The white enamel marking spot gives an excellent surface for pencil notations. Pencil marks are easily erased.