The MRCOOL NV35-3834-O is a 35-foot pre-charged No-Vac Quick Connect line set designed for R-454B refrigerant systems. It includes 3/8-inch liquid and 3/4-inch suction lines that connect the outdoor condenser to the indoor air handler, allowing refrigerant to circulate efficiently throughout the HVAC system. The line set is specifically used with MRCOOL Gen 2 Central Ducted, VersaPro ... https://www.partshnc.com/mrcool-nv35-3834-o-35-ft-pre-charged-no-vac-line-set