Features: Make of thick purpleness copper, corrosion resistance, no leakage, no fractures. Thickened nut have high hardness, no slipping, Enduring. Mechanical precise reaming, no burr, no leakage, more secure to use. Adopting double layer thickened hermal insulation cotton, which have the characteristics of heat insulation, shock absorption and not easy to age. Assembling this kits is quick and easy. Hose the low and highly pressure tubes together without manual welding. Specifically for small split air conditioning systems. Suitable for shopping malls, offices, homes, restaurants, ensuring efficient refrigeration performances. Specifications: Materials: purpleness copper Length: 2m(78.74inch)/3.0m(118.11inch)/5m(196.85inch)/7.0m(275.59inch) Low pressure pipe diameter: 10mm/0.39inch Highly pressure pipe diameter: 6.0mm/0.24inch Note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color. Package includes: 1set Hose Extension