Two formats of rack are available:60-well and 96-well. It can hold 60 or 96 screw-cap microcentrifuge tubes. Double-sided racks hold 1.5ml and 2.0ml tubes on one side and 0.5ml and 0.7ml tubes on the reverse side ● Material:Plastic ● Color:Multicolor ● Color-coded racks provide easy identification of specific laboratory procedures or individual technician's trays ● Each well is numbered for easy sample location ● Racks feature autoclavable and suitable for freezing (Fisher)