The IIAR guidelines specify component markers (IIAR 4.2). Markers stand out with component name in bright contrast black letters on yellow. The pressure level is indicated on the right portion - HIGH for more than 70 psig (black letters on red background) and LOW for 70 psig or less (black letters on green background). Printed on 5-mil thick 4" x 24" high performance vinyl with protective laminate surface and adhesive back. Service temperature rating of -20° to 176°F.