The MRCOOL MLG450-T-01 LineGuard 4.5" Tan Line Set Cover is a protective exterior enclosure designed to organize and conceal refrigerant line sets on MRCOOL ductless mini-split HVAC systems. It surrounds exposed refrigerant lines, helping protect them from outdoor conditions while maintaining a neat, professional appearance. https://www.partshnc.com/mrcoolr-lineguard-mlg450-t-01