It is used to replace the damaged toilet Bolts rubber gasket.When the gasket is fixed to the materials,it can Prevents water,air or anything from entering or flowing out. Make of rubber,with excellent aging,safe and Enduring,excellent leak sealing effect. It is not only limited to the bolts of the toilet seats Rings,but can be used for any Bolts that needs a sealing washer. Our conical washers for screws are suitable for 6mm/8mm bolts,designs to create seal between the Bolts or screw and the hard appearance. Quick and easily install Waterproof gasket protects your water Toilet tanks perfectly.