ADVANCED MATERIALSThe Long board Center Fin Box is ribbed for better hold in the board.Made of plastic and polyethylene, which is sturdy and wear-resistant,it won't add much too weight on surf board. WATERPROOF FUNCTIONCan withstand water pressure and resistance to UV damage, durable for long time to use. EASY TO INSTALLThe slot is cut delicately, work well with all single fins, fit your fins perfectly and smoothly. Lightweight and portable,Simple to attach and to remove. MULTIFUNCTIONALTypically used in Longboards, Single Fin surfboards, surfboards, sailboards or paddle boards and as a Stand Up Paddle board fin box. PERFECT GIFTUniversal for surfboard, nice accessory for surfing lovers. Great for those that are backyard shapers or pro shaper. Delivery Quantity: 1pc Package Contents: Only the above package contents, excluding other products. Size: 26.8*2.5cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) Colour: Black (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)