Frost King Slide-On Door Bottom B79/36H

U-shaped, so they slide easily on to aluminum, steel, or wood doors 1-3/4in thick The door bottom is 1-3/4in wide x 36in long and brown color Helps lock in or keep out cold and warm air, dust, dirt and bugs Adjustable for a tight fit Screw-on installation The foam tubes inside the Double Draft Stop can be cut to any size. Once the tubes are back in the case, the loose ends can be folded over to accommodate narrower doors and smaller windows.