Features: OOTDTY fresh and advantageous Material: Nitrile rubber,Features: dependable sealing and aging resistance. Pressure diaphragm of 45mm/50mm fuel water heater. A nice helper for upkeep of water heaters, gas valves, Mainly used to increase water pressure. When the water movie ruptures, it's going to leak. When the water volume is large, the water pressure at the water movie will decrease, and there could also be practically no water leakage. When the quantity of water is small, the water pressure on the water movie will increase, however the leakage commission could be faster. ThePackage 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 allow 1-2cm mistakes thanks to instruction manual measurement, simply remember to do not mind earlier than you order. 2 to the difference between various monitors, the image will not reflect the actual coloration of the item.