The Extension Kit for Maxwell Trims is designed to fit on the Gerber PLUS Valve, allowing for a 1" deeper installation. This kit is perfect for adapting your plumbing fixtures to various installation depths, ensuring a secure and proper fit. Made from high-quality materials, it guarantees durability and long-lasting performance. The extension kit is easy to install and compatible with Gerber's Maxwell trims, making it an essential accessory for any plumbing project. Enhance your bathroom's functionality with this reliable extension solution.