Semiconductor & Chemical Pipe Markers are intended for use on small diameter piping or tubing in the Semiconductor & Chemical Industries. Use with 1 in. arrow tape. Pipe markers meet ASME (ANSI) A13.1 color specifications and are for use on pipe or tubing diameters of 3/4" or less. B-946 vinyl is printed with weather resistant inks and is suited for use in outdoor applications where weatherability is a key consideration.. High gloss, durable, flexible vinyl with a permanent cold temperature pressure sensitive acrylic adhesive. Good chemical, oil and water resistance.