A box of quality Zebra 4C ink refills available in either black or blue. Each box contains 10 separately wrapped ink cartridges for your Neo Smartpen M1 & N2. Each cartridge has a small protective plastic cap on the nib that is easily removed prior to use. To replace the ink, simply tug the empty one out from the pen, gently insert a new one, scratch off the protective nib cover and get writing. Simple! Select the right colour below and add to cart.