The ODL RSSHWE retractable screen is for sliding glass doors, short-height (6"6" in-swing doors) and 6"8" out-swing doors. The overall canister heights 79-7/8" from top of unit housing to bottom of housing.The screen covers doors up to 36" wide or double doors** up to 72" wide. although **Two screens are needed for a double door application. (A Double Door kit is available as an accessory) . Replacement screen cartridges are also available should your screen ever become damaged.