Artline 5100A Black Big Nib Whiteboard Marker, 5.0 mm Bullet Tip, EK-5100A 47440. Shachihata Artline Big Nib Whiteboard markers with a jumbo 5.0 mm bullet tip are designed to be clearly visible from a distance. They have extremely dense color and are perfect for any presentation. Low odor alcohol based ink is xylene free. Tip is made from polyester fiber. Suitable for use on electronic whiteboards. Refillable with Artline X1A47435 refill ink.