Hibbentâs universal toilet tank gasket is designed for a seamless, leak-free connection between your toilet tank and bowl. Whether you're upgrading your existing setup or installing a new unit, this durable solution ensures your bathroom remains clean and dry with every flush. Engineered to fit 3-inch and 3.5-inch flush valve openings, this gasket provides a secure, water-tight seal that prevents drips and damage. It's compatible with most standard 2-piece toilet tanks, making it a reliable choice for homeowners and plumbers alike. The included brass hardware simplifies installation, allowing for quick and hassle-free setup. Made from high-quality sponge rubber, this gasket is built to last while maintaining flexibility for a snug, long-lasting fit.Universal Toilet Tank Gasket â Leak-Proof Performance for Every Bathroom