Made of high-quality stainless steel;Maximum corrosion resistance and durability in the saltwater environment. Adjustable for rails 22mm (7/8") to 26mm (1");Can be used on round or square railings. Flag pole length: 14 inches (350mm) Tube Dia:1/2 inch (12.7mm),Clamp Rail from 7/8"-1".Please confirm the size you need before purchasing. Ideal for interior and exterior applications- You can use it for house flag pole,home flag pole,car flag pole,truck flag pole,boat flag pole to meet decoration needs. Comes with Two 12 inch *18 inch American Flag.Easily hanging flag with 2 eyelets. Mounts to 7/8" to 1" rails Material: Marine Grade Stainless Steel Diameter:1/2" , Length: 14"(350mm) Surface Finish: Polished.