Spectre offers both stainless steel hose clamps and for a more polished look, we also offer polished stainless steel “collar” intake tube connection clamps. Our hose clamps are designed to fit 2.5, 3, 3.5 and 4 inch outside diameter hoses and couplers, whereas our collar clamps are designed to fit 3, 3.5 and 4 inch air intake tubing.