Features: Reliable sealed and anti-aging. Good helper in your repairment of water heater, fuel valve and etc. Made of superb materials, thus it may be used for a long time. It&;s a good choice to interchange your preceding one. Pressure Diaphragm ONLY,other kit demo in the picture isn't always included. Specifications: Material: Silicone Color: Black Diameter: app/1 Quantity: 10 pcs Note: 1. The genuine color of the article might also be slightly various from the photographs shown on web page attributable to many features equivalent to brightness of your visual display unit and light-weight brightness. 2. Please enable slight handbook measurement deviation for the data.