Generally
This hose can withstand 20 bar = 19.6 kg of constant pressure, i.e. twice as much as a normal fuel hose. It is perfect for motor oil, automatic transmission oil and petrol. It can of course also withstand coolant and is heat resistant. ( You can not use it for the pressure side of the power steering, which has a much higher pressure) It has an internal measurement of 3/8″ So approx: 9.5mm and it is bought by the metre.