20 mm x 20 mm Aluminium Extrusion Spool Holder

This is a very simple spool holder built from 20 mm x 20 mm aluminium extrusion. The upper round rod supporting the spool is also made from aluminium. Its diameter is 6.35 mm (1/4"). The length of the two bars making the vertical frame of the spool holder depends on the printer. Mines are 44 cm long.