Material The diaphragm water pumps are composed of highstrength cast iron with powdercoated finish therefore they are waterproof and rust-proof for long-lasting use. Metal Filter Included:Metal filters are provided in the package, and the metal filters can be connected to the diaphragm water pumps for more stable performance. Safer and Reliable: The self-priming automatic pumps have a built-in thermal protector that can provide automatic pressure protection. These are long-life pumps with quiet operation and no leaks. Quick Installation: These diaphragm water pumps are not only small in size, but also lightweight. They are easy to install, easy to operate and are very stable. Various Application: The misting booster pumps can be applied in food, beverage filling, and liquid transfer. The kind of pumps are known as a clean machine, road-works requirements, cooler system., Manufacturer: CCZRD