3 Pack Test Tube Rack Centrifuge Tube Holder for 10ml/15ml/50ml, Detachable Plastic Stand 128 Well Package: 1 Pack Orange Test Tube Rack (50 Well)+ 1 Pack Deep Blue Test Tube Rack(50 Well)+1 Pack Deep Blue Smaller Test Tube Rack (28Well) , Total 128 Well Broadly Compatible: This Centrifuge Tube Rack comes in two different sizes of wells, suitable for 10ml / 15ml / 50ml centrifuge tubes and laboratory test tubes. Plastic: The use temperature range is -80℃ to 70 ℃, Can not be boiled for disinfection, resistant to acid, alkali. Detachable Design: Plastic detachable test tube rack, simple structure, very easy to assemble. Test tubes pictured is for display purpose only, not included