Compatibility - Supports compatible with Microsoft Surfaceicrosoft Surface Pro 2017 Pen (Model 1776),Surface Pro 4 5 6 7/ Surface Go1 2 3/ Surface Book 1 2/Surface Studio / Surface Laptop 1 2 Pen. Note : If you have a Surface Pen with no clip, a Surface Pen with single button on flat edge, you can replace the tips. Original Quality - Our pen tips have the same quality as the original tip that comes with Surface Pen, with high sensitivity and durability. Easy To Use - Simply pull out the pen tip with the side of the storage box, very easy to replace. The hardness of H, HB, 2H ranges from soft to hard, so you can combine them according to different needs. Natural & Sleek Feeling - Made of premium rubber, safe to use. And offer a natural feel as smooth as pen on paper. Quantity - The package includes 2 x HB-type pen tips, 1 x 2H-type pen tip, and 1 x H-type pen tip.