Wacom Bamboo Stylus Replacement Nibs, Soft (ACK20501) For 1st Generation Pens Only For users who apply light on-screen pressure when writing and drawing on capacitive tablet and mobile devices, the highly-responsive soft nib eliminates the need to apply heavy pressure during use Nibs easily attach to the tip of 1st Generation Bamboo Stylus alpha (CS130K and CS130W), solo (CS100K), duo (CS110K), pocket (CS200S) and mini (CS120K) Each package includes three nibs.