The MRCOOL NV15-3834 No-Vac Pre-Charged Line Set is a 15-foot refrigerant connection set featuring 3/8-inch and 3/4-inch copper lines, designed to simplify HVAC installation. Pre-charged with refrigerant and equipped with No-Vac technology, it connects compatible indoor and outdoor heat pump or air-conditioning units while reducing the need for traditional evacuation procedures. This ... https://www.partshnc.com/mrcool-15-ft-pre-charged-line-set-nv15-3834