• Plastic, sponge
• Balance tool--this fin box sup fin box can the stability of fin box to keep safety of you when surfing
• Plastic replacement fin box for plate sup for easy replacement and repair
• Experience unparalleled stability while surfing with this innovative fin design that enhances your performance on the waves
• This fin box having an essential role when it comes to increasing stability, balancing steering maneuvers and traction
• The fin box will be a good replacement for the fin box, can keep its function