Positioning tire/wheel assemblies correctly in a tire inflation cage is one of the most repetitive tasks that any tire service technician does daily. The Tire Inflation Cage Roller Kit takes over this small aching chore and prevents back injuries. Effortlessly rotate tire/wheel assemblies of up to 450 lb/204 kg in the cage until the valve is within easy reach. The MIC-ROLLER is 100% compatible with MARTINS’ MIC-3, MIC-4, MIC-5 and MIC-OTR. Plus, it can also be used with several other types and brands of safety cages.