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Chinook Extensions

Skinny Medium Aluminium US Base Cup - 28cm

Skinny Medium Aluminium US Base Cup - 28cm


Probably the most highly regarded extensions on the market

  • Large brass rollers significantly reduce friction and give easy down hauling
  • New easy to use Composite Snap Collar, eliminates lost pins and collars and can be quickly adjusted with one hand
  • Two small moulded ramps on bottom of extension which automatically press in the US Cup push pins when connecting to base
  • Finished in a stunning blue anodized outer coating
  • Highly visible and durable height adjustment markings
  • High grip clam cleat and quality downhaul rope



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