Medium = 32cm of extension Tall = 46cm of extension
Chinook Carbon RDM Mast Extension
Chinook carbon mast extension for RDM (reduced diameter) masts. If you made sure to have a high carbon content mast, carbon boom, and a lightweight sail - you might as well finish your windsurfing rig off with a carbon mast extension! 2cm of adjustment on the composite, snap adjustment collar and oversized brass pulleys for ease of downhauling.
Medium size gives you 32cm of extension Tall gives you 46cm of extension