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N3.5-20B - Optic Mold for Glassblowing

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Product Description

N3.5-20B - Optic Mold for Glassblowing. The N3.5-20B has 20 pointed ribs. It is 3.5" tall with a 1.812" opening at the top that tapers to a point at the bottom. This mold is closed at the bottom. It is made of cast aluminum.

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