The MRCOOL DIY25-1412 DIY 9K, 12K & 18K BTU Line Set is a 25-foot pre-charged refrigerant line set designed for compatible MRCOOL DIY ductless mini-split systems. It provides the sealed connection between the indoor air handler and outdoor condenser, allowing refrigerant to circulate for efficient heating and cooling. Suitable for MRCOOL DIY air conditioners and heat pumps, this line ... https://www.partshnc.com/mrcoolr-diy-line-set-diy25-1412