The FW Enterprises gasket is designed for compatible 10-hole light-niche applications where a dependable seal is needed between lighting components. A gasket is useful because it helps create a watertight seal, supporting cleaner installation and helping reduce the chance of leaks around the niche assembly.This replacement is especially useful when the original gasket is flattened, cracked, brittle, leaking, or worn out from age and exposure. Matching the correct 10-1/2 inch inside diameter by 12-3/8 inch outside diameter size helps preserve intended fit and sealing performance.The SG400 is a practical service part when a compatible light niche needs a gasket to restore dependable sealing support. FW Enterprises light niche gasket Fits compatible 10-hole light niche applications 10-1/2 inch ID by 12-3/8 inch OD Useful when the original gasket is worn or leaking Supports cleaner and more dependable niche sealing