4 color pen

uni POSCA Soft Colors 8pk PC-5M Water Based Paint Markers Medium Point 1.8-2.5mm in Assorted Colors

BiC 5pk Retractable Ballpoint Pens Black: 1.0mm Point, Contoured Rubber Grip, Pocket Clip, Stationery & Office Supplies

BiC 10pk ECOlutions Retractable Ballpoint Pens Black Ink: Medium Point Click Pens, Office Supplies, Visible Ink Supply

Cricut 5pc Metallic Medium Point Pen Set: Multicolored Felt Tip Pens for Cricut Projects, 1.0mm, Non-Toxic, Assorted Colors

Uni ONE Gel Pen Medium Pen Point 0.7 mm Pen Point Size Multi Gel based Ink 4 / Pack