Pentel EnerGel X is the latest member of the EnerGel family. EnerGel X is a quick-drying, smooth-writing gel ink retractable pen with an easy-hold rubber grip and see-through barrel giving a visible ink supply on the easy-change refill. Refillable with LR7 refill. Pentel RECYCOLOGY Pen - contains 84% recycled materials by weight, excluding ink and refill. This is a single BL107 Energel X retractable rollerball pen from Pentel in black ink.