Ideal-Tridon Hy-Gear 50 Series Stainless Steel 201/301 Worm Gear Hose Clamp, General Purpose, 20 SAE Size, Fits 3/4 - 1-1/8" Hose ID, 19 mm - 44 mm Hose OD Range (Pack of 10) Stainless steel band for resistance to scaling and corrosion Zinc-plated carbon steel screw resists rust Worm gear mechanism for precise band adjustment Band width of 9/16 provides greater sealing area than smaller width band