3M(TM) Double Coated Tape 9579 White, 1/2 in x 36 yd 9.0 mil, 72 rolls per case Bulk 9.0 mil double coated high density polyethylene with rubber adhesive 760 on a 60 lb white densified kraft liner High-tack, hand tearable double coated film tape with a pressure sensitive adhesive on each side of the carrier. The medium-firm synthetic rubber adhesive features very high adhesion to a variety of surfaces, good shear holding power and offers one-piece removal from most substrates. Application idea: core starting on metal cores.