These resuable identification tags eliminate the challenge of labeling wire racks, trays, baskets and other wire-form items made of 1/8" (3 mm) or 3/16" (5 mm) wire. Just snap on the one-piece tag and write directly onto the smooth surface with a dry-erase marker. You can also use a permanent marker or pressure-sensitive adhesive label for unalterable identification. Chemical-resistant polypropylene tag measures 3 1/2" W x 1 1/2" H x 1/8" D (8.9 x 3.8 x 0.3 cm). Autoclavable at 250°F (121°C).