... welding machine diameter,we can change it for you,The feed -roll dimension can change it for your welding wire size ... . Our standard feed-roll size:0.6/0.8,0.8/0.9 ... 1.0,1.0/1.2,1.2/1.6,1.6/2.0,2.0/2.4Stent used four gears (2.0 mode)drive,only ... ø32*ø40*ø10wire wheel can be installed sendpic and drawing of 504A Aluminium casting feed frame