A 25 foot length (approx 7.6 metres) of heavy duty black rubber reinforced oil line. This is not suitable for petrol as it is not resistant to modern fuels with their high ethanol content. This has an internal diameter of 5/16, and a wall size of 3.0mm. This is marked in white lettering as 5/16 inch rubber oil hose 200 p.s.i. along its length.