3-Pack Replacement Ink Cartridges Contains three ink cartridges: black, blue and red Ballpoint style Need to replace the ink cartridges in the 4-in1 PDA Stylus Pen F8E708ea? Just turn the barrel on the 4-in-1 PDA Stylus Pen to go from a PDA stylus, to a pencil, to a black or red ink pen. Replacing them is easy as 1-2-3! Replacement ink cartridges for the 4-in-1 PDA Stylus Pen.