Thanks to its excellent responsiveness and sensitivity, the nib provides you with an accurate writing/drawing experience.With simple structure design, it is easy to install, you can easily install this quality nib without any tools, just replace or remove it by hand.Made of rubber high quality material, the nib slides smoothly without scratches, which greatly reduces the friction on the screen.The length of this product is 1.7cm, the width is 0.2cm and the height is 0.2cm.It is suitable for Surface Pro4/5/6/7 Pen and for Surface Pro Pen.Item Name: RefillsMaterial:RubberCompatible Models: for Surface Pro4/5/6/7 Pen and for Surface Pro PenSize:1.7cmx0.2cmx0.2cm/0.67inx0.08inx0.08inNotes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:3 X Refills