Durable valve membrane washers made of high quality rubber and plastic. Not easily deformable, with a smooth surface, they resist cracking and breaking, delivering a reliable seal for safe and long-lasting use. - Function and compatibility Effectively fixes tanks that do not operate properly and is suitable for most side and bottom inlet valves. - Size Outer diameter approx. 27 mm, inner diameter 23 mm, height approx. 15 mm (see size picture). - Pack and practicality Pack of 3 valve membrane washers, very light and easy to carry, sufficient for daily use and replacement. - Applications and use scenarios 1) In household water tanks or toilet cisterns, replace worn inlet valve membranes to stop leaks and restore proper operation. 2) In RV, boat, or garden tanks with side or bottom inlet valves, perform a quick maintenance fix to prevent dripping and ensure correct fill. 3) Keep as spare parts for routine maintenance in various containers with inlet valves, ensuring you have replacements on hand.