unit = 250 labels NOTE: If you would like labels printed with your company information, please visit the customized orders page. Combo labels can be used for hydrotesting or for six-year maintenance requirements and meet the size mandated by NFPA 10. Sold in rolls of 250. Your identification can be safely written on these blank combination hydrotest/six-year labels with a mylar marking pen. Available with and without NAFED logo (logo usage for members in good standing only).