2 Pack of 3M Indoor Insulator Kit, 5-Window Included: (2) 5.16' x 17.5' film sheet, (4) rolls of tape, 1/2" x 27.7 yd Insulates 10 3' x 5' windows Lowers heating costs and saves energy Applies easily, shrinking tight, wrinkle-free and clear on glass Increasing the R-value of single pane window by 90%