10 sets of developer gear compatible with FS 1020, FS 1025, FS 1120, FS 1125, FS 1220, FS 1320, FS 1325, MFP 1040, MFP 1041, MFP 1060, MFP 1061 DN, FS1120, FS1020, FS1125, FS1025 printers.Designed to support proper toner distribution and consistent print performance.Each set includes developer gears for replacement during maintenance or repair.smooth and image quality when installed correctly.