... BHG, SPHC, SPCC6) Surface Treatment: Zinc-coated, Copper-coated, etc.7) Inside: N2 pressure inside8) Popular Size: 4.76mmX0.7mm, 6mmX0.7mm, 6 ... .35mmX0.7mm, 8mmX0.7mm.9) Characters: high intensity, ... mechanical property, extremely good inside cleanness and nice foundation for late process. The tube can be provided in coils ...