Material: Aluminum.This starter clutch assembly is compatible with the following models: 350i, 35, 300, 350 4WD, 300S, and 320.It corresponds to OEM part number AEO-2812150B-000 (Starting Clutch Body) and OEM part number AEO-2822062N-000 (Starting Clutch Gear).This component is designed to restore factory function for the specified motorcycle applications including 400 EFI SX, 400 EFI SM, 350RX (2010 and later), 350X4 Allrad, 400 4x4 (2012 and later), 400 (2012 and later), and 400 Basic, LUX, LE, Supermoto Basic, and LE variants.