The Fortress LDK 12' Lineset Wall Duct Kit includes 12' of duct and fittings. Easily hide and protect the refrigerant lines for standard A/C installations. The LDK kit includes: LD - Ducting 4' Long (3), LJ - Couplers (2), LW - Wall Inlet, LEN - End Fitting, and LK - 90 degree Flat Ell. 3.5" width. Fortress protects lineset, wiring and drain hose from weather, vandalism, pet and pest damage. Fortress installs quickly, and can be easily accessed for repairs or replacement of the lineset.