Laboratory Instruments, Pipet Tips, PCR Products manufacturer / supplier in China, offering Cryogenic Vial Closure Color Coders Strong, Medical-Grade Polypropylene, and Can Be Repeatedly Frozen and Thawed, 2.0ml External Thread Cryovials with Multi Codes Dnase & Rnase Free, Endotoxin Free, Foreign DNA Free Stable From -196° C to 121° C Cryogenic Vials, Screw Cap Microtubes 0.5ml 1.5ml 2.0ml External Thread Non-Sterile Cryovials Dnase & Rnase Free, Endotoxin Free, and Human DNA Free and so on.