1. Compatible with pens for Microsoft Surface Pro 4/Pro 5/Pro 6/Pro 7/Book Pen and for Surface Pro Pen. Please note that the pen is not included. 2. High sensitivity. The pen tip can provide you with accurate writing/drawing experience, and has excellent responsiveness and sensitivity. 3. The quality of this nib is the same as the nib compatible with pens 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 easily install this high-quality nib without any tools, just replace or remove it by hand. Size: about 0.67x0.07x0.07in Applicable to: for Microsoft 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 products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.