Red, Medium Tip Generic Refills for Livescribe 3, Smooth-writing Premium German Ink smooth-writing German ink Red ink, Medium tips (1 mm) 5/pk, 67mm, fits Livescribe 3. (Does not fit Pulse, Echo or Sky pens) Also fit multi-pens or stylus/pen combos that use D1 style refills: Cross Tech 3, Monteverde Poquito Stylus, Moshi Stanza Duo, Pentel Vicuna, Pilot Evolt, Platinum ballpoint multipen + pencil, Rotring Trio, Skilcraft B3 Aviator, Zebra Sharbo. Money-back guarantee!