... wheel can be installed dend. Aluminium casting feed frameType:504A-BV1.0/1.2 casting feed frame without "P"504 is the ... code for wire feed frame we have 21,401,402,404,501,502,504 ... 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 ...