Our conical washers for screws are suitable for 6mm/8mm bolts, designs to create seal between the Bolts or screw and the hard appearance. 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. 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. Quick and easily install gasket protects your water Toilet tanks perfectly. Make of rubber, with excellent aging performances, safe and Enduring, excellent leak proof sealing effect., Manufacturer: Zksbdxz