Features: OOTDTY fresh and positive Material: Nitrile rubber,Features: reliable sealing and aging resistance. Pressure diaphragm of 45mm/50mm gasoline water heater. A nice helper for upkeep of water heaters, gasoline valves, Mainly used to increase water pressure. When the water movie ruptures, it's going to leak. When the water number is large, the water stress on the water film will decrease, and there may be practically no water leakage. When the quantity of water is small, the water strain at the water film will increase, but the leakage price can 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 errors due to guide measurement, simply you'll want to do not intellect earlier than you order. 2 to the difference between different monitors, the image will not reflect the particular shade of the item.