... ,49mm,etc 3.Factory cost price Cast iron pipe connectors Cast iron pipe connectors:1.Material: Copper/aluminum/iron2.Diameter: 20mm,33mm ... 1. Product Detail Name Cast iron pipe connectors ModelZY-AJBrandZHIYONGMaterialCopper,aluminum,iron material(electroplate on surface)Technique dateDiameter: 20mm,33mm,49mmProduct advantagesCost ...