The MRCOOL NV35-3834-O No-Vac Pre-Charged Line Set is a 35-foot refrigerant line set designed for compatible MRCOOL mini-split and heat pump HVAC systems using R-454B refrigerant. It connects the indoor air handler to the outdoor condenser, allowing refrigerant to circulate for efficient heating and cooling. Its pre-charged, No-Vac design simplifies installation by reducing the need f... https://www.partshnc.com/mrcool-nv35-3834-o-35-ft-pre-charged-no-vac-line-set