Springfield 1045020 White Commodore Seat Cushions are replacement Snap-On cushions designed for the Springfield Commodore boat seat shell, not the direct seat hardware or swivel base itself. Key Details • These are upholstered cushions (bottom and back pads) that snap directly onto a compatible Springfield Commodore molded seat shell. • The Seat Hardware: Standard 4-hole swivel or pedestal mounts (such as 7"x7" or 6-3/4"x6-3/4" 4-hole patterns) attach to the bottom of the plastic seat shell, not to the cushions. • Fitment: The cushions themselves do not bolt to the 4-hole hardware. Instead: 1. The 4-hole swivel/mount bolts to the bottom of the Springfield plastic seat shell. 2. The Springfield 1045020 cushions snap onto the top/interior of that same seat shell.