Wooden unit block half roman arch made from Hard Maple. Each block measures 5.5 x 2.75 x 1.375 inches with a 1.375 radius quarter circle plus a 2.75 x 1.375 x 1.375 half pillar cut out of one 5.5 inch side to create a simple L shape that can be flipped over and matched up with another half Roman arch to create a complete Roman arch. This is based on the original and current standard unit block size and shape invented by Caroline Pratt and used in quality preschools and primary schools worldwide. Safe for ages 6 months and up. Completely free of borates, pesticides, and fungicides commonly added to rubberwood after harvest. We use only 100% Hard Rock Maple. Manufactured on demand in the United States from Custom Milled Domestic FSC-Certified Hard Rock Maple when your order is received. Accurately cut to within 1/100 of an inch.
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