Rubber flat washers are widely used in home installations, and household appliances which with bolted connections. It can also be used as a sealing ring for faucet pipes, hose nuts or garden watering tool accessories.SpecificationColor: BlackMaterial: RubberInner Diameter: 25 mm / 0.98 inchOuter Diameter: 39 mm / 1.54 inchThickness: 2.5 mm / 0.1 inchPacking List: 20 x Rubber Flat WashersAdvantageMade of flexible rubber features high temperature, wear-resistant and corrosion-resistant, strong sealing, and insulation. Rubber allows for more effective sealing of harder materials or irregular surfaces.Rubber washers can be used for sealing applications, i.e. in water, oil, air, etc. They can also be used for cushioning, reducing pressure and friction, increasing the contact area and providing a support surface for fasteners.