Fabflex Bullhorn uses a 1/2” x 1/2” low profile cleat molded on a 6” centerline to ensure smooth delivery for planed asphalt, gravel, wood chips and stone slingers.
Then there's its big brother, Bighorn, with 3/4" high x 3/4” thick rounded cleats on a 9” center to carry materials up steeper elevations.