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This product has a 3/8" ID and 1" OD, which makes it suitable for use with 3/8" bolts. It is important to note that while it has a copper color, it is not composed of copper. The black oxide treatment process caused the change in color. Please note that these items are non-returnable, but they may still have practical applications for you.
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We currently ship within the US, with more countries coming soon.
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🇺🇸 Ship from USA · On Agora since 2025
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