Here's our lowest cost whiteboard marker with a bullet tip. If you want to substantially reduce your whiteboard marker costs you must consider these. The marker can be left open for a few days without the marker drying out. Sold individually (boxed in 10’s) or as a set of 4 or 8.Made in Germany, it contains a low-odour, pigment ink (no smelly solvents = no headaches!) and has a unique, easy-to-use refillable option.To refill use edding BTK25 Refill Ink (code 10070). Refill ink available in colour Black, Blue, Red, Green.