This listing includes 5 pieces of fuser gear, part number JC66-01254A.These components are compatible with printer models SCX-4725, SCX-4828, SCX-4824, SCX-4500, SCX-4626, ML-1630, ML-2570, ML-2571, ML-2510, ML-2850, ML-1910, ML-1915, ML-2525, ML-2580, ML-2851, and SF-650.The gear is designed to restore printing functionality by replacing worn or damaged parts in the fuser assembly.Installation involves removing the existing component and securing this replacement in its place to proper mechanical.