10Pcs 45mm/50mm Durable Pressure Diaphragm For Water Heater Gas Accessories Water Connection Heater Parts Black Features: fresh and wonderful Material: Nitrile rubber, Features: reliable sealing and ageing resistance. Pressure diaphragm of 45mm/50mm gas water heater. A good helper for upkeep of water heaters, fuel valves, etc. Mainly used to extend water pressure. When the water film ruptures, it'll leak. When the water volume is large, the water strain at the water movie will decrease, and there's virtually no water leakage. When the quantity of water is small, the water stress on the water film will increase, but the leakage payment would be faster. The Package Includes: 10 goods 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 because of guide measurement, just be sure to don't intellect before you order. 2 to the adaptation between diverse monitors, the picture won't reflect the actual color of the item.