3M™ Metallized Flexible Duct Tape 3350, is a 3.1 mil thick polypropylene tape with an acrylic adhesive. It is self-wound. For use with flexible ducts.
3M™ Foil Tape 3350 is a polypropylene tape for use with flexible ducts. UL 181 B-FX Listed. Metallized flexible duct tape.