Description These cryovial tubes made from premium material, especially designed for freezing. The screw would provide much convenience for the testee. For all kinds of organizations that may need to practice all kinds of body tests, the tubes are indispensable. Features - Material: PP. - These cryovial tubes are made from premium material, especially designed for freezing. - The screw would provide much convenience for the testee. - Sturdy and safe, when do some pretty basic experiments and this avoids the whole broken glass issue. - These versatile transparent plastic tubes can be used in many applications. - For all kinds of organizations that may need to practice all kinds of body tests, the tubes are indispensable.Package listing: 36 x tubes 1 x 36 holes box bracket