Bar Grating Stair Tread Stainless Steel 304 Bar Grating Stair Tread 1 in Bearing Bar Height 1.188 in Bearing Bar Thickness End Plate Height 2.5 in Top Surface Smooth Nosing Surface Checker Plate Bearing Bar Spacing 1.19 in Number of Bearing Bars 10 Tread Depth 12 1/8 in Mounting Hole Spacing 7 in Includes Mounting Hardware No Mounting Hole Diameter 7/16 in Mounting Hole Length 1 7/16 in Mounting Hole Width 7/16 in Number of Mounting Holes 4