10Pcs 45mm/50mm Durable Pressure Diaphragm For Water Heater Gas Accessories Water Connection Heater Parts Black Features: brand new and superb Material: Nitrile rubber, Features: reliable sealing and ageing resistance. Pressure diaphragm of 45mm/50mm gas water heater. A good helper for maintenance of water heaters, fuel valves, etc. Mainly used to increase water pressure. When the water film ruptures, it's going to leak. When the water quantity is large, the water pressure at the water movie will decrease, and there may be virtually no water leakage. When the quantity of water is small, the water pressure at the water movie will increase, but the leakage fee is probably 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 errors due to guide measurement, simply be sure you do not mind before you order. 2 to the difference between diverse monitors, the picture won't replicate the particular coloration of the item.