This is a fuel cap. It keeps fuel from leaking or spilling, and slows fuel evaporation when a machine is sitting for long periods. The fuel lid can be cracked or otherwise damaged, or it can become lost when removed for refilling. For the safety of the operator, a missing or broken fuel cap should be replaced immediately.Replacing a fuel cap is simple. If there is an existing cap, remove it first by turning it counterclockwise. Install the new fuel cap by matching up the unit's threads and twisting it clockwise until secure. Wear gloves when working with fuel caps.This fuel cap is a genuine OEM part. It is made of high-quality, durable materials. The cap is sold as an individual piece. The fuel cap can be used with MTD, Cub Cadet, and Troy-Bilt machines. It is compatible with blowers, cultivators, edgers, trimmers, and other lawn and garden equipment.