Ideal for use in bacteriology, RIA, coagulation and other routine laboratory procedures. There are no mold release agents that could cause errors and interferences in RIA tests. Precision molding with virgin thermoplastics ensures that our tubes are uniform in size and shape as well as being chemically clean and ready to use.- Culture Tube, 12 x 75mm, Polystyrene, 5mL, Natural, 250/pk, 4 pk/cs