Modular design. Proven product, highly configurable, easy and reduced installation and low maintenance. Allows for variety of arrangements to be made from standard components. Fully reversible option (with intermediate drive). Greater versatility with the intermediate drive. Fewer number of components with reduced adjustments. Low initial cost, reduced spare parts cost, ease of installation and maintenance. Roller bed. Lowers power requirement, conserves energy. Slider bed. Quiet operation, smooth transportation.