3M 4941/GRY15 Scotch 4941 VHB Tape: 1" x 15 ft, Grey Core: 3 inch diameter Backing/carrier: closed-cell acrylic foam (conformable) Adhesive: multi-purpose acrylic Release liner: white paper (printed) Thickness: 48 mils (carrier, adhesive) 45 mils (carrier) 3 mils (liner)