Roll Away Bleachers are portable bleachers and are great for indoor gymnasiums, schools, and community centers. Mass portable seating offers any area to become a stage for conversation or viewing. The four 5 inch rubber swivel casters and rubber stops protect floors. The equipment features welded 2 inch x 2 inch x 3/16 inch aluminum angle frames with 2 inch x 12 inch aluminum foot and seat boards. The dimensions of the unit varies by model. The 12-inch seat planks come standard with a single footboard. Double footboard models are available upon request. The first row is a 12-inch seat height.