Five Row Bleachers with Guard Rail or Chain Link with or without Aisle! All aluminum seat planks and steel understructure provide a lightweight, stable bleacher, Planks are supported by a strong, galvanized steel understructure made of 3/16"" x 1-1/2"" steel angle, Dual braces and rear stabilizing bar for additional strength and stability, Risers and double-foot planks above 30"" for added safety, Aisle option includes 2"" O, D, handrail in center of bleacher, 15" Long, 5 Row, seats 50, SKU: JYP1102