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1)Material: Gcr15
2)Tolerance: G10 G16
3)Size: 3/16", 15/64", 1/4", 17/64", 9/32", 5/16", 11/32", 3/8", 7/16", 29/64", 1/2", 17/32", 9/16", 19/32", 21/32", 11/16" 3/4", 13/16", 7/8", 1", 17/16"
4)Quality: GB/T308-2002
5)Packing: Poly bag + paper box+ carton.
Steel Ball (17.4625)
