84% RECYCOLOGY and refillable. Pentel combines the best of two worlds: liquid and gelé black soå you get the highest quality at the same time as the best writing experience. No blobs or smudged spots – can be used by left-handed people. Maximum comfort and control with latex-free grip. Pentel EnergelX BL107 is part of the Recycology series, and is made from 84% recycled plastic. Ball diameter: 0.7 mm Line thickness: 0.35 mm