The Simplicity 690549MA Pulley is an authentic OEM replacement part designed for various Simplicity ZT series zero-turn mowers, including models like ZT3000, ZT3500, ZT4000, ZT4200, ZT4500, ZT4800, ZT5000, ZT5200, ZT6100, ZT7000, ZT7500, ZT8000, and the 2691060 series. This durable pulley is crucial for maintaining proper belt tension and facilitating the smooth operation of the mower's deck or drive system. With dimensions of 165.1 mm in length and width, a height of 38.1 mm, and a weight of approximately 0.68 kg, it ensures reliable performance and longevity for your Simplicity equipment.