3M Indoor Window Insulator Kit, 3 by 5 8-Windows Included: (1) 5.16' x 28' x 0.75 mil film sheet Lowers heating costs and saves energy Included: (2) rolls of tape, 1/2" x 16.8 yd and 1/2" x 13.8 yd Applies easily, shrinking tight, wrinkle-free and clear on glass Insulates eight 3' x 5' windows