Outer Size - 3 3/8 inches in diameter. Perfect splash guard for ISE and other 3 bolt grinders. NOTE: Please measure and confirm the outside diameter of your garbage disposal opening and choose the correct outside diameter of the splash guard. Why you need our splash guard: A splash guard can prevent water and debris from splashing up and reduce the noise of the grinder. It can bring you a more enjoyable and relaxing cooking experience. Easy Installation and Cleaning - No tools required, the splash guard is removable for cleaning and allows easy access to the grinding hopper. Reminder: Please make sure the disposal is connected to the sink when you want to replace the splash guard so that it can be sealed tightly. Premium Material: High quality nitrile butadiene rubber with excellent wear resistance oil, high wear resistance, good heat resistance, strong adhesion. Note: The data is all manual measurement, please allow 1-3cm error. Due to the difference between light and display, there