The cryogenic storage box is constructed of plastic material, for long time sue. Accommodates most microtube as well as most manufactured brands of cryogenic vials. The transparent cover for easily viewing. It is simple in design, but it's practical to use, which will give you a fantastic use experience. Features - Color: Transparent. - Material: Plastic. - Size: 14.00X8.00X5.00cm/5.50X3.14X1.97inch. - Selected material, which can be safely and durably used for a long time. - The quality vial rack can be repeated and thawed, and practical. - The cryogenic storage box is widely used to fix laboratory freezing tubes or tubes. - It is very suitable for storage in mechanical freezers or liquid . - It is simple in design, but it's practical to use, which will give you a fantastic use experience. Package list: 1 x freezing tube box