The Ongaro Throttle Knob, specifically identified as "1189" with red grooves, is a single-piece accessory designed for throttle control in certain applications. The knob features a round shape and a special feature of being easy to install. The included components consist of the knob itself, providing convenience for throttle management. With a handle type specified as a knob and styled as a functional round knob, this product serves as an essential control component for certain systems, offering ease of installation and operation.