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