For Honda Fuel Overflow Vent Line Hose 10ft - 3.5mm ID 7.5mm OD 95001-35003-60M
£11.84
This is typically used on the brass fittings at the base of the carburetor (overflow lines). It was also used as vent lines on many of the SOHC carburetors, these are the two lines that run up over the airbox.