3M™ Polyester Protective Tape 336, Transparent, 7 1/2 in x 144 yd, 1.5 mil, 4 Roll/Case. Designed to protect polished and metal and plastic surfaces, 3M™ Polyester Protective Tape 336 is a thin, transparent, polyester film tape with a low tack rubber adhesive with minimal adhesion build-up. It is commonly used to protect surfaces during production, packing, shipping and installation.