Pro Tapes DUVE-PRO/BLK325 Duve-Pro Duvetyne Felt Tape: 3" x 75 ft, Black Core: 3 inch diameter Backing/carrier: polyester felt Adhesive: acrylic Release liner: paper Thickness: 34 mils (carrier, adhesive, liner) 30 mils (carrier, adhesive) 4 mils (liner)