This Ryan 544909A Commercial Walk Behind Lawnaire IV aerator features a 19 inch spreading width and a 4 HP Honda Engine. This unit comes with commercial-grade components such as a solid steel axle and austemper-hardened steel coring tines. Ryan 544908A Aerator Features: The fold-down handle allows unit to be more compact for transporting and storing Thirty tines are 3/4", austemper-hardened steel coring tines For easier lifting and quick transportation, the weights are easily removable 4 HP gas engine Easy to use, self-propelled lawn aerator ideal for equipment rentals Rugged, heavy-duty construction Folding handles and lift grips for compact, easy transport Removable weights Drum-style Solid steel axle 19" spreading width 29,000 sq. ft. per hour aeration rate table { width: 100%; border-collapse: collapse; text-align: center; border: 1px solid black } td, th { border: 1px solid #dddddd; padding: 8px; } Width Weight Height Length 0 Inch 0 Gram 0 Inch 0 Inch