Cast iron is mainly composed of iron, carbon and silicon alloy composition, with high strength, good toughness, plasticity and machinability.Casting the primary color, the surface frosted, anti-rust treatment, threaded alignment, chassis formation.Can be made bookshelves, drying racks, put objects, retro lighting, and other crafts.Color: BlackMaterials: Cast ironConnection Method:screwSize:1/2 inchInner Diameter:1.8cmType:axial typeProduct Usage:floral, lamps, shelves, hanging racks, industrial supplies, and so onPackage Included: 1 x flangeNote: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.