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Amazon.com: Brush Research 3" (76mm) Flex-Hone Cylinder Hone Tool 80 Grit (Silicon Carbide) : Industrial & Scientific
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Honing brush for repairing valve body channels (for holes with a diameter of 16 mm) Aluminum Oxide #320
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Flex-Hone Product Line: flexible flex hone honing tools, flexhone, Flex-Hones, ball-hones, dingleberry hones, manufactured by Brush Research Mfg - Newman Tools
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Brush Research GB31412 FLEX-HONE®, 3-1/4" (83mm) Diameter, 120 Grit, Silicon Carbide Abrasive (Pack of 1): Amazon.com: Industrial & Scientific
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