The Washer 6.4x16x1.5 is the lowest priced item on this 039a Fairing schematic.
The 039a Fairing is made up of components including this Left Lower Fairing Dark which is the most expensive.
thirty-four components are shown in this Mts620 2006 Usa (multistrada 620 Dark) 9151-2331b 039a Fairing exploded diagram.