Lint Free Spiral condenser It is made of copper coated tube and steel board, coated with cathodal electrophoresis, It has good corrosive resistance (with testing at sealed box with steam of saltwater form 48 hours ,free of rust),meets the requirement of the ROHS by testing by SGS. ideal for the cooling system of refrigerator, freezer, it can be instead of coiled finless condenser, and the cost is lower than that. Copper coated tube diameter(mm): 4.76, 6.35, 8.0 Thickness of steel board :0.25mm