Water heater components strain diaphragm alternative parts Reliable sealing and anti-aging. Good helper for water heater, gasoline valve and assorted maintenance. Made of wonderful materials, it may be used for an extended time. Replacing the outdated one is a reputable choice. Type: Gas water heater package colour:black Material:glue size:50mm Package Contents: 20 * Water-gas linkage valve Only the above equipment content, different merchandise should not included. Note: Light and different reveals can cause the color of the thing in the photograph considerably diversified from the real thing. The size allowed error is +/- 1-3cm.