A molded rubber roll for use in conjunction with one or more additional rolls of similar construction on a hay conditioning machine. The roll has a cylindrical peripheral intermediate surface with a plurality of rows of integral lugs extending radially outwardly therefrom and a plurality of rows of depressions extending radially inwardly therefrom. When a pair of such rolls are mounted in parallel relationship on a hay conditioning machine, the intermediate surfaces of the rolls are in continuous rolling contact as the rolls rotate and the tops of the lugs of each roll contact the bottoms of the depressions in the opposite roll, thereby forming three different levels of crushing surfaces which crush the hay as it passes between the rotating rolls. The lugs and depressions are preferably circular shape but may be molded in other shapes such as diamonds, hexagons, rectangles and the like. The rolls are normally molded or splined to a metal shaft which in turn is rotatably mounted on the hay conditioner machine.