NAVIGATION
Ruby sphere; diameter(mm), 3.18 (1/8in); grade 25
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Ruby sphere; diameter(mm), 4.76 (3/16in); grade 25
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Ruby sphere; diameter(mm), 0.25; grade 25
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Ruby sphere; diameter(mm), 1.00; grade 25
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Ruby sphere; diameter(mm), 1.25; grade 25
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Ruby sphere; diameter(mm), 1.50; grade 25
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