A hex hose finisher for AN12 hose with a 25.0 mm internal diameter. Larger hose leaves a correspondingly larger and more obvious cut end, so a finisher makes a bigger visual difference here than it does on small-bore lines. The clamping body grips the hose firmly onto its spigot, which matters at this size because the hose carries real volume and pressure pulses, while the hex outer form matches the look of the machined fittings elsewhere in the system. Typical applications are intercooler pipework, large breather lines and coolant plumbing. Size on the outside diameter of your hose measured over the braid, and tighten the clamp evenly around the circumference.