... 1,low carbon steel tube 2,popular size:4.76*0.65mm,4.76*0.7mm,6*0.7mm etc. ... 1/4 inch Copper coated Pipes Feature:1) Widely be ... Zinc-coated, Copper-coated, etc.7) Inside: N2 pressure inside8) Popular Size: 4.76mmX0.7mm, 6mmX0.7mm, 6.35mmX0.7mm, ... 10 years).Main Characteristics:Excellent mechanical property, extremely good inside cleanness and nice foundation for late process. The tube ...