Compatibility - Supports for Microsoft Surface Pro 2017 Pen (Model 1776), for Surface Pro 4 5 6 7/ Surface Go1 2 3/ Surface Book 1 2/Surface Studio / Surface Laptop 1 2 Pen/Surface Slim Pen 2. 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 HB is moderate and the hardness of 2H is 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 3 x HB-type pen tips and 2 x 2H-type pen tips.