A cushioned P clamp measuring 7.9mm inside diameter, one step up from the smallest size. It suits small hose, rigid tubing, gauge lines and wiring bundles of matching outside diameter. The soft cushion inside the metal band lets it hold thin-walled tube securely without deforming it, and prevents the band edge from wearing through insulation or hose cover over time. Small clamps like these are what turn an untidy engine bay into a reliable one: a line that cannot move cannot chafe. Measure the outside diameter of the line before choosing a size, and anchor the clamp to a solid point rather than a flexible panel.