2 Pack of 3M Indoor Insulator Kit, 2-Window Included: (2) 5.16' x 7', (4) rolls of tape each 1/2" x 500" Insulates four 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%