Compatible-only compatible with Surface Pro 4 Pen Pro 5 Pro 6 Pro 7 ProX Book Go, etc. Highly sensitive-the tips offer you a precise writing / drawing experience. With excellent responsiveness and sensitivity, you can write without restriction. Original quality-the quality of the pen tip is as good as the original, which is compatible with surface. No scratches: the fine rubber tip is clean and smooth. No scratches, friction on the screen is also greatly reduced. Easy installation-they are: HB HB HB 2H 2H. Without tools, the pen tips are easy to attach. Only by hand can you replace or remove the tips. Specification: Model: HB HB HB 2H 2H Applicable models: for Surface Pro 4/5/6/7/Book ProX Size: 1.5*0.1*0.1cm Colour: Black Material: ABS Applicable Model: For Surface Pro 4 For Surface Pro 5 For Surface Pro 6 For Surface Pro 7 For Surface Pro (2017) For Surface Book1/2 For Surface Laptop1/2 For Surface Studio For surface go1/2