Blue Econ-O-Fit Hose ClampEcon-O-Fit Size 5Econ-O-Fit I.D. 35/64"Fits Perform-O-Flex & Auto-O-Flex Hose Size 4 or 5Hose I.D. 1/4"Fits Fuel LinesEcon-O-Fit is the original anodized aluminum hose clamp cover. It's appearance dresses up any installation. Econ-O-Fit's specially designed interior grooving prevents the hose from "hanging up" on the clamp and ensures proper placement of the worn gear type clamp with respect to the end of the hose.