Description:1. Fit for 50ml freezer tubes, 4x4 array, 16 Places.2. Constructed of cardboard with a white coating and this style is non-waterproof.3. Keeps your freezer tubes firmly inside while the box is closed.4. Widely used on holding laboratory freezer tubes or centrifuge tubes.Specification:Material: Non-waterproof CardboardOverall Size: 150x150x125mm / 5.91*5.91*4.92 Inch (L*W*H)Hole Size: 34x34mm / 1.34*1.34 InchHole Depth: 90mm / 3.54 InchFitting for: 50mL Micro Tube, 16 PlacesPackage Content: 2 x Freezer Tube Box