The Uni Chalk Marker is perfect for writing on Blackboards.
  The uni-ball Chalk Marker range is water-based and gives vibrant colours that are perfect for eye-catching designs.
Ideal for non-porous Chalk Boards or glass in pubs, cafes and restaurants.
They are also rain resistant, making them great for use outdoors.
The ink can be easily removed from non-porous surfaces using a damp cloth or mild detergent.
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Line width 1.
8mm to 2.
5mm, medium bullet tip.
Available in a wide range of colours