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Chinook Aluminum Extension - US Cup Standard Diameter Medium

The Chinook Aluminum Extension uses their new six pin collar for easy and solid adjustment. The anodized logo/index markings are one of the many unique and innovative features that make these the most popular extensions on the market. Comes standard with the proven US Power-Haul pulley and cleat system and 2cm adjustment increments.

  • Medium length adds a maximum of 28cm to mast length
  • Standard diameter
  • US basecup
  • Large brass pulleys for increased leverage

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