Welcome to our store. Our merchandise have affordable charges and good quality. We supportdropshippingandwholesale. If you prefer to paintings with us for a long time, please touch us and we are able to offer you a completely favorable charge Regards! Reliable sealing and anti-aging. Good helper for water heater, gasoline valve and diverse maintenance. Made of effective materials, it may be used for a protracted time. Replacing the outdated one is a good choice. Type: Gas water heater package Model: Pressure diaphragm colour:Black Material:rubber size:Diameter 73mm Package Contents: 20 x strain diaphragm Only the above package content, assorted merchandise usually are not included. Note: Light capturing and assorted exhibits may cause the colour of the thing within the photograph a chunk varied from the genuine thing. The dimension allowed error is +/- 1-3cm.