Basic laptop stand

Basic laptop stand consisting of two printed brackets connected by a 20x20 mm aluminium extrusion (6 mm groove) and held together by M4 screws with matching hammer nuts. The washers I use have a diameter of 10 mm. The stand offers 19 cm length at a 20° angle. The stoppers in front have a relative height of 12 mm. With my HP Pavilion 14" laptop the stoppers finish at almost at the exact same height and in the back is enough room to open and close the screen.