The Corteco Sway Bar Link Washer - 49399304 is a small, circular metal washer designed to be used in conjunction with a sway bar link. The washer is used to secure the sway bar link to the vehicle's chassis, providing stability and reducing body roll during turns. It is made of durable materials to withstand the constant movement and pressure of the sway bar link. This specific product has a part number of 49399304 and is manufactured by Corteco, a trusted brand in the automotive industry.