The MRCOOL line-set guard for ductless and unitary products. Keep the outside of your home looking good while protecting your HVAC system. Over time the sun can damage your line-set, the MRCOOL Line Guard will protect your line-set from harmful sun exposure and prolong the life of your system. The MLG450 Kit includes: -Ducting 4 ft. Long (3), Couplers (2),Wall Inlet (1), End Fitting (1), 90 Degree Flat Elbow (1), Lock Clips (4), Strap Ties (4).