| 2920 | Ring 70 mm outside Ø with Bosshead steel, 8 mm Ø*zinc plated*three point support*nickel plated...
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| 2921 | Ring 100 mm outside Ø with Bosshead steel, 8 mm Ø*zinc plated*three point support*nickel plated...
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| 2922 | Ring 130 mm outside Ø with Bosshead steel, 8 mm Ø*zinc plated*three point support*nickel plated...
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| 2930 | Ring 70 mm inside Ø with Bosshead steel, 8 mm Ø*zinc plated*three point support*nickel plated...
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| 2931 | Ring 100 mm inside Ø with Bosshead steel, 8 mm Ø*zinc plated*three point support*nickel plated...
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| 2932 | Ring 130 mm inside Ø with Bosshead steel, 8 mm Ø*zinc plated*three point support*nickel plated...
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