Safety Data Sheet Center Boards Provide easy access to safety data sheets (SDS) in the workplace with center boards. Sturdy .063" aluminum backboard is 20"H x 15"W and printed with bold red diamond border for high visibility. PVC-coated steel wire rack holds 3-ring, 1 1/2" diameter binder (included). Four corner mounting holes are supplied for easy installation. Centers are sold as complete kits including the backboard, rack and binder.