Uni-Ball Impact Gel Pen 2/Pkg-White Sanford-Uni Ball Impact Gel Pen: White. Make a statement with thick and vibrant ink that provides striking, bold colors! Features ultra-smooth ink flow with a bold tip. Comes in a barrel design with a rubber grip. This package contains two 5-1/2 inch vibrant white gel pens with 1.0mm tips. The ink is refillable and acid free. Imported.