Polished surface: the surface is polished, the surface is smooth, the design is beautiful, it can be easily installed without removing the railing, and the overall shape is beautiful. Universal type:Complies with standard specification, strictly according to factory quality control. DURABLE - Ideal for use at sea for maximum corrosion resistance and durability in salt water environments. Premium material: this marine pipe clamp made of stainless steel is made of solid marine grade 316 stainless steel which is durable, waterproof and rustproof. Applicable to: suitable for boats, yachts, fiberglass yachts, inflatable yachts, business yachts, and other types of yachts. Size options: approx. 22 mm / 0.87 inches, 25 mm / 0.98 inches, 30 mm / 1.18 inches, 32 mm / 1.26 inches.