SmartPen Livescribe 3 Compatible Refills 67mm, D1. Fits mini pen or multipen
Fits any mini pen or multipen using D1 refills including. SmartPen Livescribe 3 Compatible Ballpoint Ink Refills D1 67mm Length. D1 67mm pen refill is a standard pattern used in most multi-function pens and many compact or expanding pens.