Mustang Squareback Seat - Double Diamond - FL/FX '18-'26941721008 Product Description One piece, 2 up seat combines form and function with a sleek profile and rider focused ergonomics Wide driver bucket is cut low and backed by a high rising rear wall that provides crucial lower back support for confident riding Squared off wide passenger section offers added functionality for two up travel, without compromising the bikes performance inspired stance Mustangs proprietary controlled density foam formula