3M(TM) UHMW Film Tape 5421 Transparent, 2 in x 18 yd 6.7 mil, 6 per case Boxed 3M(TM) UHMW Polyethylene Tape 5421 Transparent, UHMW polyethylene film with rubber adhesive. 3M(TM) UHMW Polyethylene Tape 5421 helps protect plastic and metal chutes, guide rails and containers from wear. Low coefficient of friction combined with abrasion resistance make this tape an effective solution for many noise and vibration problems.