VEVOR Boat Seats, 555 mm High Back Boat Seat, Folding Boat Chair with Thickened Sponge Padding and Hinge, Fold-Down Boat Captain Chairs for Fishing Boat, Sightseeing Boat, Speedboat, Canoe, 2-Pack
Yes, it can be fixed to a fibreglass base. This boat seat comes with mounting screws and washers, and it fits a 5" x 5" boat pattern swivel or pedestal. As long as your fibreglass base meets this installation specification, you can install it easily.
