High-Quality Materials: Vertical centrifuge tubes are made of high-purity material, non-pyrogenic, DNase/RNase-free, autoclavable at 121℃/249.8℉, and can be Freeze to -80℃/-176℉. Leakproof: The vertical centrifuge tube design features a longer screw cap with a sealing ring to prevent leakage. The bottle cap can be tightly screwed on the centrifuge tube and has good sealing performance, effectively preventing liquid leakage. Smooth and flat inner , no residual solution. Easy to read: Transparent appearance, high visibility allows you to easily view the sample inside, 50 ml sterile centrifuge tube, easy-to-read white scale, from 5.0 ml to 45 ml in 2.5 ml increments. Writing Area: Centrifuge tubes also include a large white writing area for easy labeling and identification. The patch is great for marking, and the scales and writing area are chloroform . Wide range of applications: Our plastic centrifuge tubes are commonly used in the fields of biochemistry and molecular biology, such as the separation and preparation of biological samples. Material: plastic colour: As Shown Package Contents: 150 x plastic test tubes with caps Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.