12 in. - Duct Clamps - Worm Drive Fastener - Stainless Steel - Rust Resistant - Sold By Each - UltraGrow UG-FCFP/12 Brand: UltraGROW - Part No.: UG-FCFP/12 - UPC: 638104003858 - Diameter: 12 in. - Material: Stainless Steel