The MTD 75605042 is a genuine OEM tension pulley designed for a wide range of MTD brand outdoor power equipment, including lawn tractors and riding mowers from brands like MTD, Cub Cadet, Troy-Bilt, Yard-Man, Bolens, Huskee, White Outdoor, and Yard Machines. This durable plastic idler pulley ensures proper belt tension, facilitating efficient power transfer and smooth operation of drive systems. With an outer diameter of 107.95 mm (4.25 inches) and a bore diameter of 9.53 mm (0.375 inches), it is a critical component for maintaining optimal performance and extending the lifespan of your machinery's belt drive.