It is suitable for all sizes of one way valves,non return valves,check valves, oil supply valves, oil pumps, hand pumps and aluminum joints.It is suitable for all sizes of oil supply joints and hand pumps.Medium used: crude oil, gasoline, water, etc. (not suitable for methanol, because methanol will produce formic acid when electrified, which will corrode the interior of the product and lead to product failure)Scope of application: for , for , Vessel, Helicopters, Ships, Motorcycles and other systems.Advantages: crude resistant, gasoline resistant and aging resistant.Specifications:Specification: 8mmOpening pressure: 0.2 barWorking pressure range: 0.2-6 barWorking temperature range: -30 -130 colour: silverMaterial: aluminum alloyPackage Contents:1 x Check ValveOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.