Scapa 425/BLK230 425 Pro-Grade Gaffers Tape: 2" x 30 yd. Core: 3 inch diameter Backing/carrier: vinyl coated cloth Adhesive: natural rubber Thickness: 12 mils (carrier, adhesive) 4.5 mils (adhesive) Adhesion: 70 ounces per inch (to stainless steel test panel)