The Oregon 34012 is a genuine Oregon flat idler pulley designed for optimal performance in lawn and garden equipment. Featuring a durable sealed bearing, this pulley has an outer diameter of 114.3 mm (4-1/2 inches), an inner diameter (bore) of 12.7 mm (1/2 inch), and a width of 28.575 mm (1-1/8 inches). It serves as a direct replacement for multiple OEM part numbers, ensuring reliable operation and proper belt tensioning in compatible machines.