Description: Features: Reliable sealed and anti-aging. Good helper for your repairment of water heater, gas valve and etc. Made of high quality materials, thus it can be used for a long time. It's a good choice to replace your old one. Pressure Diaphragm ONLY,other accessories demo in the picture is not included. Specification: Material: Plastic Color: Black Diameter: app.73mm,2.87in Quantity: 10 Pieces Note: No retail package Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 10 Pieces x Pressure Diaphragm