Straight Flat Plate, Silver, Anodized, Number of Mounting Holes 4, Overall Height 6 in, Slide-In, Overall Length 6 in, Overall Width 1 1/2 in, Aluminum 6063-T6, Inside Corner Bracket Style Standard, 15 Series, System of Measurement Inch, For Profile Width/Height 5/16 in, Joining Plate, For Slot Width 21/64 in