COMPREHENSIVE REPLACEMENT KIT FOR LEAK PREVENTION​ - This o-ring kit is specifically designed to stop leaks and restore proper function to your poultry waterer. It effectively solves the common issue of leaking or tray overflow that occurs when the critical top lid o-ring fails. ​PERFECT FIT FOR MILLER LITTLE GIANT & FARM TUFF MODELS - Ensures full compatibility with popular 3, 5, and 7-gallon plastic poultry waterers. Specifically fits for Miller Little Giant PPF3, PPF5, PPF7 and Farm Tuff P3G04, P5G04, P7G04 models, guaranteeing a perfect seal. ​RESTORES FACTORY-SEAL WITH HIGH-QUALITY BUNA-N​ - Each o-ring is molded from high-quality Buna-N (Nitrile) material, matching the original specification. This ensures long-lasting durability, flexibility, and reliable performance, just like when your water fountain was new. ​COMPLETE KIT WITH 5 O-RINGS FOR CONVENIENCE​ - The kit includes five (5) identical o-ring gasket seals. This provides you with a direct replacement for the failed seal and valuable spares for future maintenance, saving you time. EASY SOLUTION FOR AIR-TIGHT SEAL RESTORATION​ - A leaky waterer is often caused by a broken top lid o-ring losing its air-tight seal. Replacing it with this kit is a simple fix that will quickly restore the vacuum function of your waterer, preventing water waste and keeping your coop dry.