Flat Concave-End Open ShankThis Concave End setting compatible with 4 prong solid base setting and bezel setting. Surface finish: Semi Polished, Approx. Shoulder Width: 2. 5 mm, Approx. Shoulder Height: 1. 2 mm, Approx. shank base width: 2. 5 mm, Approx. shank base thickness: 1. 2 mm, Stocked finger size: Standard US 4, 4. 5, 5, 5. 5, 6, 6. 5, 7, 7. 5, 8, 8. 5, 9, Made in USA.
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