Patco 580/BLU236 580 Screen Printing & Graphics Protection Tape: 2" x 36 yd, Blue Core: 3 inch diameter Backing/carrier: low-density polyethylene (ldpe) film Adhesive: acrylic Thickness: 5.5 mils (carrier, adhesive) 4.5 mils (carrier) Adhesion: 50 ounces per inch (to stainless steel test panel)