Bleacher, 5 Row x 21'-0"L, (10" Nominal Seat Planks, 10" Nominal Tread Planks, 17" Front Row Seat Height, 8" Rise, 24" Tread), Aluminum Frame, Single Footboards On Rows 2 & 3, Double Footboards & Riser On Row 4 & Higher, Galvanized Steel Picket Guardrail<