Wacom Replacement Nibs ACK-20001 Polyacetal Nibs (5 pieces) / ACK-20003 Hard Felt Nibs (5 pieces) This is a set of 5 unused genuine replacement nibs for Wacom pen tablets, two types in total. Compatible with pens that use the "Standard Polyacetal Nibs ACK-20001" such as those for Intuos4. I am selling these because I have less opportunity to use this type of pen. I am also selling these on other sites, so if you are interested in purchasing, please be sure to leave a comment to confirm availability. Please note that I will not be able to negotiate a price reduction for this item.