3M Indoor Window Insulator Kit - Patio Door, 2144W-6 Available in a variety of indoor and outdoor window sizes, 3M Window Insulator Kits keep cold drafts out and warm air in through heat shrink window film and Scotch Window Film Mounting Tape. Quick and easy installation. 3M window kits stay up all season long with Scotch tape technology. Clearest window film available. 7100075739 - 00051131501256
