• nylon
• Boat shark-fin--increase the stability and direction of the surf bar,Inflatable Boat Tail Rudder
• Boat tail rudder--used for all kinds of inflatable surfboards,Boat Shark-fin
• Inflatable boat tail rudder--made from nylon material for durable long time use,Boat Shark-fin
• Surfboard tail rudder--it is glued to both sides of the plate surface to assist the use of the central water splice,Boat Shark-fin
• Surfboard shark-fin--the water splitter of the seat board is glued to the back end of the reverse side of the board,Boat Shark-fin