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Zetex Tape^ Tape, ZetexA-550, strong and flexible. Good for thermal and acoustic insulation,Fiber Type : Texturized Fiberglass, Finish : Untreated, Ends X Picks: 19 x 8, Weave: 1x1 Plain, Thickness: 30 mil, Peak Temp: 700 deg C, Operating Temp: 540 Deg C, Applications: Flange gasketing, 1in