Compatible with RDM mast.<br> Fits primary sails, free sails, senior sails, and large masts.<br> Very good mechanical properties, light weight and superior quality.<br> The bottom is used to connect the universal base so that the sails and board are connected to use.<br> The windsurfer can change the height of the mast according to the wind strength, easy to operate the sail.<br> Specification:<br> Material: Aluminum alloy, Stainless steel, Polyethylene fiber<br> Overall Length: Approx. 50 cm/19.7 inch<br> Thickness: Approx. 3 cm/1.2 inch<br> Adjustable Mast Length: Approx. 34 cm/13.4 inch<br> Rope Length: Approx. 180 cm/5.9 ft<br> Rope Diameter: Approx. 6 mm/0.24 inch<br> Main Color: Black<br> Package Includes:<br> 1 Piece Mast Extention<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store