Each spray nozzle will be passed by strict tests before shipment to check the products have any bad phenomenon such as leakage and O-ring deformation.Our water spray nozzle have different output water type after the rotation and can be used in a variety of circumstances.copper nozzle is light weight and anti-aging.Different way to output the water can control the water yield.The o-ring has a strong seal on the stem.We have the strict inspection standards before deliver goods so that the customer can receive the more satisfaction and best quality products.