unit = 250 labels NOTE: If you would like labels printed with your company information, please visit the customized orders page. This label meets NFPA requirements for hydrostatic retest of DOT cylinders used as fire extinguishers. Sold in rolls of 250. Your identification can be safely written on these blank hydrotest decals with a mylar marking pen. Available with and without NAFED logo (logo usage for members in good standing only).