This is a 425ml canister of Engine Flush from the Wynns automotive brand. Formulated to be used with both petrol and diesel engines, this flush cleans out pipework, chambers, and valves, and it also helps to lengthen the lifetime of automobile components. Each container of Wynns Engine Flush weighs 0.6lbs, and the product also improves friction proofing and lessens the noise of hydraulic lifters.