AIGNER Warehouse Aisle Pallet Rack Sign Kit helps your create signage for your warehouse pallet racking. Snaps into upright frame holes. Soft plastic hinge flexes, without breaking, when bumped. Holds paper stock or plastic sign blanks up to .100" thick. Compatible with any laser or ink-jet printer. Kit includes (10) 5 1/2x8 1/2" label holders and (12) 8 1/2x11" laser/ink-jet sheets.