Spectre Magna-Clamp 6166 is designed to fit 1-3/4 inch inside diameter as well as AN-32 radiator hoses that has a maximum outside diameter of 2-1/4 inches including any covering. The stainless steel gear drive clamp features a two-piece blue anodized aluminum housing that provides secure tightening at an affordable price. Magna-Clamps are designed to perform as well as they look and are ideal for race, street, and show. The Spectre Magna Clamp features a two-piece blue anodized aluminum housing that provides a secure fit 1-3/4 inch inside diameter radiator hoses.