The Briggs & Stratton 5436K Fuel Tank Cap is an OEM replacement gas cap designed for Briggs & Stratton lawn mowers. Made of durable plastic in a sleek black color, this fuel tank cap is compatible with models 5436 and 799585. It weighs 0.12 pounds and is sold individually, offering a reliable and high-quality replacement part for your lawn mower. Made in the United States, this fuel tank cap ensures a secure fit and proper functionality for your Briggs & Stratton mower.