【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. 【Compatible】only compatible for Surface Pro 4 Pen Pro 5 Pro 6 Pro 7 ProX Book Go, etc. 【Original quality】the quality of the pen tip is as good as the original, which is compatible for surface. The fine rubber tip is clean, without scratches, and has relatively little friction on the screen, and will not scratch the screen. 【No scratches】 the fine rubber tip is clean and smooth. No scratches, friction on the screen is also greatly reduced. 【Highly sensitive】Stylus nib is fast and accurate, very sensitive, providing you with accurate writing and drawing experience. Specification: Model: 2H 2H 2H 2H 2H Applicable models: for Surface Pro 4/5/6/7/Book ProX Size: 1.5*0.1*0.1cm Colour: Black Material: ABS Weight: 15g Applicable Model: For compatible with Microsoft Surfaceicrosoft Surface Pro 4 For compatible with Microsoft Surfaceicrosoft Surface Pro 5 For compatible with Microsoft Surfaceicrosoft Surface Pro 6 For compatible with Microsoft Surfaceicrosoft Surface Pro 7 For compatible with Microsoft Surfaceicrosoft Surface Pro (2017) For compatible with Microsoft Surfaceicrosoft Surface Book1/2 For compatible with Microsoft Surfaceicrosoft Surface Laptop1/2 For compatible with Microsoft Surfaceicrosoft Surface Studio For compatible with Microsoft surfaceicrosoft surface go1/2 Note: Pen is not included. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. 5 X Pen Tips