The offers support for your back and legs while fishing.• 5" x 12" universal mounting bolt pattern• Marine-grade vinyl is UV-treated, mildew-resistant, and water-resistant• Use with Springfield stand-up pedestals (not included)• 5-year mfr. warranty on substrate/frame; 1-year mfr. warranty on upholstery/cushions• Front Height 4.785"• Back Height 7.149"• Width at widest point 18.5"• Width at narrowest point 12.5" Use with Springfield stand-up pedestals (not included) 5" x 12" universal mounting bolt pattern | Pro Casting Seat