300dpi A type  printerhead ink cartridge  for pro36,pro50 novajet printer
300dpi B  type  printerhead ink cartridge for pro60e,pro500/505 novajet printer
high quality ,print fluently .

300dpi A is made from lexmark 13400 (also can  made from  lexmark 1145) ,the cap is different
300dpi B type is made from lexmark 1382050 ,the cap is different .