This hotend group assembly include hotend,nozzle , blower fan , hotend fan , enclosure , extension board , pulley , bracket 

can be replacement for A10M A20M printer.  

pls write a comment for your order , let me know which control board does your A10M/A20M has , V4.0 or V4.1B . 

so we can send right things to you , as we have different extension board for different control board version .