Compatible with Glacier Bay's Fluidmaster 83SGB dual flush valve. The sealing gasket measures 81x51x2.5mm, ensuring reliable valve sealing. Made of silicone, it is soft, durable, heat-resistant, and corrosion-resistant, resisting aging or cracking over long-term use. Specifically designed for dual flush valve structures, ensuring a good seal, preventing leaks and drips, and improving flushing efficiency. Replacing worn gaskets effectively prevents leaks, reduces maintenance frequency, and extends the overall lifespan of the toilet., Manufacturer: ECSiNG