Matte, light gray finish gives labels a rating and serial plate appearance Labels are designed to withstand numerous solvents and variable temperatures when applied to various surfaces UL approved;CSA accepted Service temperature of -40 to 248° F (-40 to 120° C) Metallized Polyester (B-428) labels are designed for applications that use barcodes, alphanumerics, graphic symbols and logos and require nameplate-like quality.