NAVIGATION
Sapphire sphere; diameter(mm), 1.19 (3/64in); grade 25
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Sapphire sphere; diameter(mm), 1.59 (1/16in); grade 25
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Sapphire sphere; diameter(mm), 3.18 (1/8in); grade 25
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Sapphire sphere; diameter(mm), 5.00; grade 25
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Sapphire sphere; diameter(mm), 4.00; grade 25
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Sapphire sphere; diameter(mm), 3.50; grade 25
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