Sold and Priced as a set of four (4) - Designed with hard thick steel to cut down on blade changes on the job. Each blade is designed for longer life and greater performance. long life blades are ideal for tough demands of riding power trowel. Fits: Stone T-36 (34578) Allen 336 (AEC-614F) - Marshalltown Equivalent Sku 14004 Part # M6093ELB