MCT Box are moulded in polycarbonate and are therefore strong as well as autoclavable. One size can hold 64 MCT’S of 1.5 ml. & and the other can hold 100 MCT’s of 0.5 ml.. 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 bet ter inventory control.