If the cartridge that you are trying to refill was the original cartridge shipped with your printer, you will need to purchase this product because such a cartridge will not already have a flag gear installed.
Each Flag Gear Kit contains the following:
This flag gear kit is recommended for the following printers: DCP-7060D, DCP-7065DN, HL-2220, HL-2230, HL-2240, HL-2240D, HL-2242D, HL-2270DW, HL-2280DW, MFC-7360N, MFC-7460DN, MFC-7860DW