HIGH QUALITY MATERIAL: These 0.2ml Conical Centrifuge Tubes with High purity PP Material, no bubble without impurities. It can Autoclavable at 121 and freezable to -80. LEAK-PROOF: These disposable plastic centrifuge tube have snap cap, which is used to prevent sample leakage and it smooth, flat inner surface, no residual solution. DETAIL: One Pack of 1000Plastic micro tubes, Length: 22mm approx.. Diameter: 6mm approx. Capacity: 0.2 ml; Material: Plastic, Color: Transparent. EASY TO USE: Maximum speed:12000r / min, conical bottom, with attached snap fit lids. Withstand temperature range: -80 - + 121. Ideal for samples, food colorings, craft use, etc. It is autoclavable at 121 and freezable to -80. WIDE APPLICATIONS: Our plastic centrifuge tubes are general used in fields of biochemistry and molecular biologysuch as separation and preparation of various biological samples.