A billet separator bored to 12.7 mm for AN5 hose. AN5 sits between the fine gauge and brake sizes and the heavier fuel and oil lines, and it shows up on brake plumbing and mid-size feed lines where AN4 is marginal. Two AN5 lines running together over any distance need support, and this separator provides it while setting a consistent, deliberate spacing that makes the whole installation look considered rather than improvised. Clamp the halves over the routed hose and either mount the assembly to structure or space it evenly along an unsupported span. As always, verify your hose outside diameter against the 12.7 mm bore before ordering.