Description Manufacturer part #:23.09 Technical Description Features American Metric Stainless steel track 12.99/21 in 330 mm Width 1 1/16 in 28 mm Height 3/8 in 9 mm Thickness 1/16 in 1.5 mm Opening 1/16 in 15 mm Hole Diameter 3/16 in 5 mm Hole Spacing 13/16 in 21 mm