... /Pipe Material :SPHC, SPCD,ST-14,BHG,BCD Outdiameter :3.17mm-12mm Single Layer Copper-coated Steel Bundy Tube/Pipe Features :1) Material ... ,ST-14,BHG,BCD2) Outdiameter :3.17mm-12mmThickness :0.5-1.0mm3) Widely used in kinds of freezing equipment , cycled pipes in ... .4) Surface treatment :Copper coated or zinc coated are available Single Layer Copper-coated Steel Bundy Tube/Pipe