1480 Features: OOTDTY brand new and wonderful Material: Nitrile rubber, Features: reliable sealing and ageing resistance. Pressure diaphragm of 45mm/50mm gas water heater. A nice helper for maintenance of water heaters, fuel valves, Mainly used to extend water pressure. When the water movie ruptures, it will leak. When the water volume is large, the water stress at the water movie will decrease, and there's almost no water leakage. When the quantity of water is small, the water stress on the water movie will increase, however the leakage charge might be faster. The Package Includes: 10 items of 45mm/50mm size. Specifications: Material: Plastic Weight: 25g/35g Size: 45mm/50mm Color: Black Package Includes: 1x Pressure Diaphragm Note: 1 enable 1-2cm mistakes thanks to guide measurement, just remember to do not mind earlier than you order. 2 to the adaptation between different monitors, the image won't replicate the actual shade of the item.