Compatible Models: Compatible with American Standard H2Option dual-flush toilets with tank models 4035.216 and 4035.516, ideal for routine maintenance and replacement needs Dimensions: Each seal measures approximately 2-5/8 inches (66 mm) outer diameter, 1-3/16 inches (30 mm) inner diameter, and 1/8 inch (about 3.1 mm) thick Helps Fix Leaks: Each set includes 4 silicone seals used to replace aged, worn, or deformed flush valve gaskets. Installing new seals can help repair continuous tank leaks or incomplete flushing without replacing the entire flush valve, saving time and repair costs Durable Material: Made of silicone material that offers good flexibility and sealing performance. After installation, the seal fits closely into the flush valve groove and helps restore normal flushing function Easy Installation Steps: The installation process is straightforward and requires no complicated tools. First, turn off the water supply and remove the water tank cap. Rotate the flush valve to remove it, take out the old sealing ring, insert the new sealing ring into the groove, and then rotate it until it is firmly in place This 7381042-0070A silicone flush valve seal is compatible with American Standard FloWise dual flush valves and fits tank models 4035.216 and 4035.516. It is used to replace aged seals and helps address leaking or flushing issues. The soft silicone material is easy to install and supports a reliable sealing effect. There is no need to remove the entire flush valve. During installation, simply turn off the water supply, remove the old seal, place the new gasket, and restore normal operation.