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Extremely versatile device for measuring both inside and outside diameters of large circular objects where straight measurement is not possible. Simply place the caliper's points against a ruler after gauging the object for measurement. The bow caliper is molded from durable plastic material designed to stand up to normal classroom wear and tear. At the same time, it is light enough to be handled by children. It has no toxic coating, no sharp metal points and is easy to clean. Some of the things you can measure with the Bow Caliper include a bicycle tire, the inside and outside of a pipe, and the trunk of a tree! Practical and useful examples demonstrating the importance of learning how to measure. Bow Caliper measures 38 cm long.

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