3M™ Double Coated Tape 9009, Clear, 4 1/4 in x 360 yd, 2.1 mil, Roll 3M™ Double Coated Tape 9009 is .8 mils of 300 high strength acrylic adhesive, .5 mil polyester carrier, .8 mils of 300 high strength acrylic adhesive on a 3.2 mil 55 lb densified kraft paper liner