Kimble 45042 KIMAX Reusable Test Tubes with Beaded Lip and Marking Spot. These test tubes are made from KG-33 glass tubing with a sturdy lip and uniform wall thickness for maximum heat transfer and chemical resistance. Durable white ceramic enamel marking spot on each tube. Designed from ASTM Specification E982, Type I requirements.
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O.D. x L (mm): 25 x 200