Attwood Swivl-Eze 238333-1 Stainless Steel Square Boat Seat Pedestal BaseThis stainless steel boat seat pedestal is constructed for longevity in marine environments. This square boat seat base requires a 3" diameter mounting hole and has a 7" x 7" footprint.Product Features: 7" x 7" Square Seat Mount; Centered Hole; Stainless Steel; 3" Diameter Mounting Hole;