Rollerball Pen Made From Recycled Pet Plastic, Reducing the Use of Virgin Plastic. the Ink in a Gel Pen is a Combination of Water-Based & Oil-Based Components, Which Gives It a Smooth & Consistent Flow That is Comparable to a Fountain Pen. This Type of Ink is Also Known for Its Resistance to Fading, Making It a Popular Choice for Artist & Writers Alike. Gel Pen Typically Have a Fine Tip That Allows for Precise & Controlled Writing. Minimum Quantities Apply.