NAVIGATION
Ruby sphere; diameter(mm), 1.50; grade 25
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Ruby sphere; diameter(mm), 1.75; grade 25
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Ruby sphere; diameter(mm), 2.00; grade 25
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Ruby sphere; diameter(mm), 3.00; grade 25
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Ruby sphere; diameter(mm), 3.50; grade 25
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Ruby sphere; diameter(mm), 4.00; grade 25
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