Single Layer Copper-coated Steel Bundy Tube/Pipe Material :SPHC, SPCD,ST-14,BHG,BCD Outdiameter ... :3.17mm-12mm Single Layer Copper-coated Steel Bundy Tube/Pipe Features :1) Material :SPHC, SPCD,ST-14, ... 12mmThickness :0.5-1.0mm3) Widely used in kinds of freezing equipment , cycled pipes in cars and electronical heatting fields ... are available Single Layer Copper-coated Steel Bundy Tube/Pipe