Pilot BeGreen G-Knock Gel Ink Pen - Pen Point Size: 0.7mm - Ink Color: Black - 2 / Pack Sold as 2/PK. Gel ink rolling ball pen is made from 81.5 percent recycled material. Dynamic gel ink formula is designed for smooth writing. Retractable pen is smear-proof. Refillable with Pilot G2 Fine Gel Ink refills.