These preferred model feature double foot planks on all rows for additional safety!! Available in 4 colors: Navy, Royal, Scarlet Red and Forest Green Framesare 100%welded aluminum angle Features 2" x 10" powder coated seat planks and 2" x 10" mill finished foot planks on all rows Comes with Safety End Caps -No sharp edges to snag clothing or skin. Bleachers can be transportable or fastened to a concrete slab (fastening hardware not included) Some assembly required Due to constantly changing specifications, please check local building and safety codes to ensure compliance.