1. Compatible with for Surface Pro 4/Pro 5/Pro 6/Pro 7/Book Pen and for Surface Pro Pen. note that the pen is not included. 2. High sensitivity. The pen tip can you with accurate writing/drawing experience, and has responsiveness and sensitivity. 3. The quality of this nib is the same as the nib compatible with for Surface. 4. The fine nib slides smoothly and without scratches, which greatly reduces the friction on the screen. 5. Easy to install, you can install this high-quality nib without any tools, just replace or remove it by hand. Size: about 0.67x0.07x0.07in Applicable to: for Surface Pro 4/Pro 5/Pro 6/Pro 7/Book Pen Colour:black Material:plastic Package Contents: 3 x Pen Tip Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.