The Board Dudes Board Accessories for chalk, cork, dry erase and magnetic boards. Dry Erase Marker Fine Point 4pc Blue/Black/Green/Red- Use on dry-erase boards, glass, and most non-porous surfaces. Works for messages and presentations They are long lasting and have a durable tips, they erase easily, quick drying, have low odor ink, are non squeak and non toxic. Re-cap markers when not in use. Do not shake, and store horizontally.