The Plumbsure Rubber Ball Valve Washer, with a 30mm diameter, is designed for reliable performance in plumbing systems. This pack of 2 durable washers effectively seals ball valves, helping to prevent leaks and maintain water flow efficiency. Made from high-quality rubber, the washers offer excellent resistance to wear and tear over time. Suitable for a range of domestic and commercial applications, these Plumbsure valve washers provide a cost-effective solution for routine maintenance or repairs. Easy to install, they are compatible with most standard 30mm ball valves.