The product is a genuine BRIGGS & STRATTON 399635 muffler exhaust made of high-grade steel. This muffler is designed specifically for lawn mowers and is a durable and reliable component for maintaining the quiet operation of the engine. Made by a reputable brand like Briggs & Stratton, this muffler ensures quality and compatibility with your lawn mower. It is an essential part for maintaining your lawn mower's performance and ensuring a peaceful outdoor experience.