One pair of fin box fillers that fit Futures fin boxes. Reduce drag from your five finbox surfboard setup. These will fill the void you may or may not have known you wanted filled. If you ride your board as a quad or thruster then your empty finboxes are creating unwanted drag! These finbox fillers reduce that drag. get your pair today in either white or black. These only fit the quad read and thruster stabelizer finboxes.