Artline Whiteboard Marker Black Refill Ink, ESK-50A-60 47435, 60ml Bottle. Refill Ink for Artline 5109A Big Nib Markers plus 500A, 509A, 550A, and 5100A whiteboard markers. Black Artline Shachihata Refill Ink Whiteboard Marker ESK50A60. Insert refill ink nozzle into marker body. Squeeze bottle gently to inject ink into marker.