Made in Canada - Twist Green ring to unlock the spring loaded nozzle for pouring and push the nozzle down on fuel tank filler neck to pour. - When used with fuel cans breather cap closed, fuel will automatically stop flowing once fuel level reaches the tip of the nozzle (Recommended). Pulling can and pourer up from filler tank neck will release the spring and mechanically shut the pourer preventing spills. - Best flow rate results when used with 4L, 5L and 10L size Pro Quip Plastic Fuel Cans (With breather cap closed). Pourer sealed by Nitrile Rubber internally as well as under Fuel Can Cap. - Will fit Pro Quip 15L and 20L Plastic Fuel Cans but will reduce the flow rate. Loosening off the fuel can breather cap will allow a fast flow however stop flow functionality of the pourer is eliminated. Mechanical shut off function still remains when lifting can up from fuel tank neck.