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. Note: 1.We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need. 2.Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm) 3.There are no instructions included in this kit.Professional Installation Is Highly Recommended！ 4.Please Compare The Decorative Flange With Your Original One Before Purchasing！ Product Us.