Pre-drilled Aisle and Bay I.D. Markers - 220mm x 450mm Markers manufactured from rigid styrene to identify aisles or bays within stockrooms, factories and warehouses, supplied pre-drilled for easy fixing and with specified printed characters to suit identification system. High visibility aisle markers manufactured in rigid white or yellow styrene with black characters Pre-drilled in four corners for easy fixing Overall size: 220mm(h) x 450mm(w) Choose from markers with different character lengths: I.D. Marker - 220mm(h) x 450mm(w) - Specify up to 1 x 180mm Digit I.D. Marker - 220mm(h) x 450mm(w) - Specify up to 2 x 180mm Digits I.D. Marker - 220mm(h) x 450mm(w) - Specify up to 3 x 180mm Digits Colour options: Black writing on Yellow or White background