Ideal-Tridon Snaplock 56 Series Stainless Steel 201/301 Quick Release Worm Gear Hose Clamp, 12 SAE Size, Fits 3/8 - 3/4" Hose ID, 13 mm - 32 mm Hose OD Range (Pack of 10) Stainless steel band for resistance to scaling and corrosion Zinc-plated carbon steel screw resists rust Quick release screw swivels to lock or disengage the clamp Band width of 9/16 provides greater sealing area than smaller width band