DETAILS
2-Bolt Quick Release “Upper” Mast Base Universal US Base Cup. – Upper part only for Two-Bolt “Quick Release” Tendon Mast Base – US Base Cup – Features an integrated 6 mm hex tool to be used with Chinook’s 2-Bolt Quick Release Base Plate shown below. 
COMPATABILITY
The Chinook Two-Bolt Tendon Upper US windsurfing mast base is best matched with the Chinook US extensions shown below.
| Chinook Windsurfing Skinny Carbon Mast Extension US | ![]() |
| Chinook Windsurfing Carbon Mast US Extension SDM | ![]() |
| Chinook Windsurfing Skinny Aluminum Mast Extension US | ![]() |
| Chinook Windsurfing Aluminum Mast US Extension SDM | ![]() |











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