The Lely 2321700371 is a genuine OEM gear set featuring 17/18 teeth, designed for Lely Splendimo and Optimo series mowers. This essential component ensures precise power transmission within the machine's gearbox, maintaining optimal performance and durability. With an outer diameter of 115 mm, an inner diameter of 40 mm, and a thickness of 40 mm, this gear set is a direct replacement for original Lely equipment.