Shurtape SF-682/MSIL260 SF-682 HVAC Metalized Duct Tape: 2" x 60 yd, Metalized Silver Core: 3 inch diameter Backing/carrier: polyethylene film with a polyester/cotton blend cloth carrier Adhesive: natural rubber Thickness: 10 mils (carrier, adhesive) Adhesion: 50 ounces per inch (to stainless steel test panel)