Stainless steel. Fits most standard upright freezers. Overall rack size (H x W x D): 238 x 139 x 571 mm. With four drawers to hold 16 boxes of 133 x 133 x 53 mm. Drawers feature a unique stop that when fully extended pivot down allowing for easy box access. Freezer rack also includes a pull-out wire handle for easy removal off the shelf. Polycarbonate drawer handles provide a user-friendly grip. Includes a slot and label for drawer/sample identification.