The Replacement Filter Canister Support Lid for Polaris Robotic Pool Cleaners, part number R0517700 (now R0865100), is an essential replacement part for the Polaris 9300, 9300xi, and 9400 models. This durable lid is designed to securely fit onto the filter canister and features a thick rubber gasket on the bottom to ensure a tight seal. With this replacement lid, your pool cleaner can effectively filter out debris and keep your pool sparkling clean. Upgrade your Polaris pool cleaner today with the OEM Replacement Filter Canister Support Lid.