Carbon fiber post with lower terminal in Delrin and auto-locking system by bearings. Deck socket with silver anodized aluminium flange or high polished stainless steel flange. Drain spigot included. Internal fitting with line and 3:1 tackle for canvas stretching. When you pull the line for canvas tensioning the pole is automatically locked into the deck socket. When you release the line it unlocks the pole. It requires drainage. Available in four standard dimensions: Ø 40 mm, Ø 60 mm, Ø 80 mm , Ø100 mm; length on request. It is supplied with stowage bag. The data-sheet is availble for download.