Thickened nut have high hardness, no slipping, Enduring. Mechanical precise reaming, no burr, no leakage, more secure to use Specifically for small split air conditioning systems. Suitable for shopping malls, offices, homes, restaurants, ensuring efficient refrigeration Assembling this kits is quick and easy. Hose the lowly and highly pressure tubes together without manual welding Make of thick purpleness Coppers, resistance, no leakage, no fractures Adopting double layer thickened thermal insulation cotton, which have the characteristics of heat insulation, shock absorption and not easy to age, Manufacturer: REITINGE