SCMR050 50-hole freezing tube rack 50 pcs/box Reusable freezing box in PC(polycarbonate) material. Autoclavable cryotube workstation rack in PP(polypropylene) material. Freezing box is for 81(9 X 9) pcs of standard cryogenic vials or vials of lid Dia 12.5mm. Cryotube workstation rack size: 208mmx93mmx25mm. Cryotube Workstation rack is for 50(10 X 5) round bottom or self-standing cryotubes.