Polycarbonate 81 or 100 cell 2”boxes hold most popular cryo and cold storage vials and fit into standard freezer racks. Boxes have clear lids with locator grid to facilitate sample identification. Polycarbonate boxes are designed to withstand temperature extremes of -196℃ to 121℃. Boxes have drain holes for venting and safety. Keyed lid prevents misalignment of grid.