Product compatibility: these replacement digital pen nibs are designed for many digital models, and compatible with wacom Bamboo Intuos pens, like CTL-471, CTL-671, CTL-472, CTL-672, CTL/CTH-480, CTL/CTH-680, CTL/CTH-490, CTL/CTH-690,TCTL-4100, CTL-4100WL, CTL-6100,TL-6100WL, PTH-451, PTH-651, PTH-851, DTK-1301, DTH-1300, DTK-2200, DTK/DTH-2700; Please take a careful check your pen model before buying | Fine standard tip: this kind of standard fine tip is sensitive and flexible for you to use, providing you with a comfortable writing and painting experience, bringing more accurate information and giving you an original feeling just like writing on paper | Nice accuracy: our refill digital pen nib can keep your pen in nice precision, suitable for many pen models, which will give you a smooth writing or painting experience without worrying about worn problem | Rich quantity: the package includes 20 pieces of standard replacement digital pen nibs, which will ensure you work smoothly; The rich quantity can meet your daily needs, and its simple use is convenient for you to replace yourself | Easy to install: standard pen nibs are easy to install and only take 2 steps, you just need to use a small plier to get a replacement nib, and then insert into the hole, easy to operate, nice performance, will serve you for a long time