Pure brass that's hand-polished to a fine sheen.
Pure brass in its natural state with a slightly rough antique finish.
White nylon plastic polished to reveal a smooth matte finish.
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Our CEO @weijmarshausen gives a talk to kids @USAScienceFest on how 3D printing turns dreams to reality. #SciFest pic.twitter.com/xX9oQU5r5x
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