These are designed to hold securely any products built in the standard Canford 89mm and 106mm width extruded aluminium boxes. They also fit the older 106mm wide Canford Eurocard extrusion. They are black, powder-coated steel, and have two countersunk mounting holes, 4.5 mm diameter. Mounting screws are not included. Overall dimensions: 146 (l) x 50 (h) x 20 (w) mm for 89mm width boxes, 163 (l) x 47 (h) x 20 (w) mm for 106mm width boxes and Eurocard extrusion.