MCT Boxes are moulded in polycarbonate and are therefore strong as well as autoclavable. One size can hold 64 MCT`s of 1.5ml & the other can hold 100 MCT`s of 0.5ml. These boxes are designed to work at temperatures ranging from -190°C to +121° C. The transparent cover provides a good view of the contents inside & is numbered for better inventory control. Material :PolycarbonateAvailable in two sizes: 1)Rack for 100 MCT`s of 0.5ml2)Rack for 64 MCT`s of 1.5ml