The Chinook Sailing Aluminum US Cup SDM uses our 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 Power-Haul pulley and cleat system and 2 cm adjustment increments.
- Minimum length of 4cm.
- Standard Diameter
- US Cup to your mast base.
- Large brass pulleys for increased leverage