Nunc Freezer Rack with Cryogenic Storage Boxes. Aluminum rack dimensions in inches; 22.5 h x 5.5 w x 5.5 d. Holds 8 boxes of Nunc Cryostore Mega-Max 100 storage boxes. The MAX-100 box permits storage of 100 internally threaded 1.0-1.8mL CryoTube vials. Cryogenic storage boxes are made of polycarbonate. Divider accessories are made of polyethylene-coated cardboard.