The unique IBS rubber cover kit includes a cupped area for attachment of infill-type synthetic turf as well as vertical rubber barriers to retain infill material, creating a safe transition where the rotor is retracted. The IBS can also be trimmed to create a flattened area for attachment of short-pile non-infill turf, running track material, or the new ST-FRP1600 simulated concrete cover. All four options provide a clean and safe installation that is unmatched in the industry.