Bar Grating Stair Tread Stainless Steel 304 Bar Grating Stair Tread 1 in Bearing Bar Height 0.188 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 8 Tread Depth 9 3/4 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