This premium mini split copper line set features thickened copper tubing with excellent thermal conductivity, ductility, and corrosion resistance for long-lasting, high-efficiency performance. The 3/8 in. double-layer embossed insulation is flame retardant, waterproof, and provides superior thermal protection, reducing energy loss and preventing condensation. Designed for a wide temperature range (-40 to 248 ), it supports various refrigerants and fits most mini split air conditioners and heat pump systems. Pre-flared ends with nuts ensure secure, easy connections. The complete kit includes a 25 ft. insulated copper line set, 10 ft. drain hose, insulation straps, 27.5 ft. 16/4 AWG electrical cable, wall putty, and a decorative wall cap everything needed for a professional installation. Durable, efficient, and versatile, it s an ideal solution for residential or commercial HVAC setups.