The Simplicity 1501109MA Pulley is an authentic OEM replacement part designed for a wide range of Simplicity lawn and garden equipment. This flat idler pulley is crucial for maintaining proper belt tension and ensuring smooth power transmission within your machinery's drive system. With an outer diameter of 114.3 mm (4.5 inches), a bore diameter of 15.875 mm (5/8 inch), and a width of 25.4 mm (1 inch), it is engineered to original specifications for reliable and durable performance. This genuine Simplicity part replaces the older part number 1501109 and is compatible with models such as Broadmoor, Regent, Conquest, Prestige, Legacy, Courier, and various ZT series zero-turn mowers.