Durable PolarSafe storage boxes are the perfect solution for freezer storage and organization. Matte surface on box sides are suitable for printing and or labeling. Boxes withstand temperatures from -80°C to +121°C and will not degrade like cardboard boxes. Tight fitting lid ensures samples will not fall out; even when held upside down. Fits in standard 5¼” square stainless steel freezer racks Holds 0.5, 1.5, and 2.0mL microtubes as well as most brands of vials Dual alphanumeric grid (inside and outside) for sample identification Top of box is clear for visual inspection; bottom is available in four fluorescent colors, natural, or in a pack of assorted colors Fits most standard 2” stainless steel freezer racks