Megatape, 1/2" x 260', Gray 3.5 Mil Thick, Professional Virgin PTFE Tape, 450 To 500 Degrees Fahrenheit Temperature Range, .070 To 1.00 G/C3 Density, 10,000 PSI, Allows For Fewer Wraps & Resists Tearing/Ripping, Improved Aesthetics, Performs Better, Chemically Inert, Seal Threads On Virtually Any Piping System, Including Stainless Steel Pipe, Cast Iron, PVC, CPVC & ABS Pipe, Brass & Chrome Fittings & Gas Connections, Approvals & Listings Meets UL 31 RO & 7N15 Mh18499.