remium Heavy Duty 304 Stainless Steel T-Bolt Clamps . CLAMP INNER DIAMETER - 3.5"(82-90mm) - 3.5"(86mm-94mm) - 3.75"(97mm-105mm) - 4"(102mm-110mm) - 4.5"(110mm-118mm) - 5"(127mm-135mm) BAND WIDTH - 19mm (3/4"). THICKNESS - 0.8mm material thickness (most of our competitors are only 0.6mm thick). Only Our Heavy Duty Clamps Include ALL of the following: MATERIAL - Industrial grade premium 304 STAINLESS STEEL band, bridge and T-cock will not rust. Most of our competitors only offer 301 grade steel. Nut and bolt steel hardware are galvanized for rust resistance. DURABILITY/GRADE - Clamps are INDUSTRIAL GRADE 304 STAINLESS, designed for both medium and heavy duty applications and made to handle the toughest conditions. NO RUST - Made from the finest 304 stainless steel with premium galvanized steel hardware, for the ultimate rust prevention. TEMPERATURE - Clamps can handle extreme temperatures and weather conditions. GUARANTEE - One Year Guarantee against workmanship and defects. PRO SELLER - We are a professional manufacturer and a professional seller with great ratings on ebay. Buy with confidence!