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Product Description
donut diameter without these edges are 152.4mm or 15.24 cm plus approx 4-6mm edges.
Top part. You need both or maybe if some custom situation then just this one.
Here is second half:
https://www.shapeways.com/product/XVA6B3FNG/rodin-marko-half-donut-coil-edges-bottom-part
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