5 Hole - Center Tap Base Plate Metric For Profile Type Double Fastener Thread Size M12 x 1.75 Anodized Fastener Thread Length 44 29/64 mm Overall Height 80 mm Aluminum 40 Series Includes Fasteners No Overall Depth 19 mm Overall Width 19 mm Mounting Hole Diameter 8 mm Required Tap Thread Size M8x25 Fastener Mounting Type Drop In Adjustable Yes White Compatible Brand and Series 80/20 40 Series Includes Tap