Product Description 12 inch Size is for DIAMETER, NOT FOR circumference. – 304 Stainless Steel Hose Clamps- The whole large duct vent clamp (including the band, housing and screw) are all made of premium 304 stainless steel. Durable, strong and rust resistant. Flexible adjustable size rang- Flexible and durable metal fuel line hose clamp with … Continue reading China OEM 12inch Stainless Steel Hose Clamps Worm Gear Duct Fuel Line Pipe Customization worm and wheel gear