10pcs Pack Nibs Replacement Tips with Removal Tool 1. The pen nibs are made of high-quality materials, offering excellent wear resistance for extended lifespan and providing a smooth writing and drawing experience on the tablet surface. 2. The set includes 10 replacement nibs and a dedicated nib removal tool, offering great value and providing everything you need for convenient maintenance of your digital pen. 3. Replacing the nib is quick and easy. First, use the included removal tool to grip and remove the old nib; second, gently push the new nib into the pen tip until it clicks securely into place. 4. 1st generation nibs are compatible with the following models: CTL-4100, 460, 470, 471, 472, 480, 490, 6100, 671, 672, 680, 690; CTH-460, 470, 480, 490, 680, 690; CTE-450, 460, 650, 660; PTH-450, 451, 650, 651, 850, 851; PTK-440, 450, 640, 650, 840, 1240, 540WL; PTZ-430, 431, 630, 631, 930, 1230, 1230W; DTH-1300, 2400, 2700, A1300; DTK-1300, 1301, 2100, 2200, 2400, 2700; W1300, W1310; MTE-450; CTF-430. 5. 2 generation nibs are compatible with the following models: TH-1320, 1620, 2421, 3221; DTH-W1320, W1620; PTH-460, 660, 860; DTK-1660, 1661, 2421.