This is one set of our Moped Rack Clamp Blocks.

Small size works with tubes 6-12mm in diameter (0.25-0.50IN)
Medium size works with tubes 12-19mm in diameter (0.5-0.75IN)
Large size works with tubes 16-28.5mm in diameter (0.63-1.125IN)

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Do you have a unique application that requires a custom solution? Send us an email, we'd be happy to help you create the perfect set up for your needs.