• Plastic, sponge
• Balance tool: this fin box can increase the stability of the sup and keep you safe while surfing
• A strong fin box. the repairing tool is balanced to surfing lovers.
• This fin box having an essential role when it comes to increasing stability, balancing steering maneuvers and traction.
• Plastic replacement fin box for plate sup for easy replacement and repair.
• The fin box is adopted the safe plastic and sponge material, tough, wear-resistant and durable