Description: 1 Piece 34cm RDM mast extension windsurfing with surf baseplate tendon joint base. Tendon joint provides excellent performance and is easy to replace. This unique design is very low to the deck with four finger ribs for easy adjustment. The windsurfer can change the height of the mast according to the wind strength, easy to operate the sail. The bottom is used to connect the universal base so that the sails and board are connected to use. Specification: Mast Extention: Material: Aluminum alloy, Stainless steel, Polyethylene fiber Overall Length: Approx. 50 cm/19.7 inch Thickness: Approx. 3 cm/1.2 inch Adjustable Mast Length: Approx. 34 cm/13.4 inch Rope Length: Approx. 180 cm/5.9 ft Rope Diameter: Approx. 6 mm/0.24 inch Main Color: Black Windsurfing Mast Base: Material: Plastic, stainless steel Base Dimension: approx. 11.5 x 16.5 cm / 4.52 x 6.49 inch Color: Black Package Includes: 1 Piece Windsurfing Mast Base 1 Piece Mast Extention Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!