- Precise fit for 3 inch flush valves: matched size ratios solve compatibility issues on 3" valves and help maintain consistent water pressure. - Water saving design: sealing system minimizes constant purge of rinse water, restores full flushing power, and enables cost-efficient operation with precise water dosing on every flush. - Durable PVC construction: high-quality PVC provides years of use without sacrificing elasticity or the closing precision of the flap mechanism. - Easy, tool-free installation: replace the toilet flapper in three steps without special tools or prior knowledge; intuitive method reduces maintenance downtime and is suitable for self-installation by private users. Suitable uses and scenarios: - Residential bathrooms: retrofit or replace a worn flapper on a 3" valve to restore reliable flush performance and water efficiency. - Rental properties: simple DIY upgrade to lower maintenance calls and keep toilets operating efficiently. - Small offices or public restrooms: quick maintenance with minimal downtime during flapper replacement.