Big SUP single fin and small side fin detachable fin for longboard, surfboard and paddleboard replacement quick fin.Designed for easy installation and secure fit, this fin set includes one large center fin and two smaller side fins.Compatible with various board types, the fins are constructed to enhance stability and control during use.The quick-release mechanism allows for simple attachment and removal, making it convenient for transport or storage.Suitable for recreational and casual use on flatwater or moderate conditions.