The Fisher and Western 5307 is a genuine replacement gasket designed for the aluminum housing Arrow lights historically used on Fisher, Western, Meyer, and Diamond snowplows from the 1970s. This specific gasket, compatible with the 779 series Arrow lights, ensures a tight seal for your plow's turn signal lens (Fisher part number 5309). Investing in this authentic OEM part guarantees a precise fit and helps maintain the integrity of your classic plow lighting system.