Royal Mail Approved Compatible Blue DM50, DM55, and K700 also fits K780002, K721, and RK721 Non-Fluorescent Ink Cartridge Replaces OEM part number 797-0SB
Royal Mail Approved Compatible Blue DM50, DM55, and K700 also fits K780002, K721, and RK721 Non-Fluorescent Ink Cartridge Replaces OEM part number 797-0SB