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Naturalist equipment
The 15 cm ornithological ruler is a measuring tool specially designed for ornithologists working in the field. Made of stainless steel, it is lightweight, durable and resistant to corrosion. It has a foot on one end, facilitating the accurate measurement of wing span in birds.
A 30cm version exists.
This product is made by Ecotone. You can find the rest of their products on their website.
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