AN10 PTFE hose is stiff and needs a generous bend radius, which is exactly the problem this 120-degree end solves. By taking the turn inside the fitting it lets you run cooler, dry sump and high-volume fuel lines out of a port and straight back the way they came without stressing the liner. The olive-and-nipple seal is the same as the rest of the PTFE range and the end can be rebuilt with a new olive. At this size the assembly is heavy enough that the hose should be clamped and supported near the fitting. Decide the bend orientation before assembly, as it cannot be swivelled afterwards.