Inexpensive spreading board for beginners is formed from styrofoam. It has soft pinning surfaces, and a varied center groove. The board is 12″ (305mm) long, and 15/16″ (24mm) high. Pinning surfaces are 1-3/4″ (44mm), and center groove is 3/16 – 7/16″ (5 – 11mm).
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