Specification: 1:Accommodate 0.5mL, 1.5mL, and 2mL centrifuge tubes or PCR tubes and 1.8ml cryotubes. 2:Each side contains 12 x 5 configurations and are used for freezing, storage, transport, and general benchtop use. 3:They are autoclavable at 250 degrees F and 15psi for 15 minutes. 4:The racks are 9" long, 2-1/16" deep, and have a 10.5mm well diameter. 5: Five assorted colors.