A cushioned P clamp with a 9.5mm inside diameter, matched to AN4 hose. AN4 lines typically run to gauges, senders, regulators, clutch circuits and other low-volume services, and because they are light they get overlooked when a build is being tidied. That is a mistake, as a small unsupported line will happily rub against a bracket or a moving part until it fails. The cushion inside the band holds the hose firmly while protecting the cover and damping vibration. Mount the clamp to solid structure, keep it clear of heat sources, and choose the size from the hose outside diameter rather than its AN designation alone.