6540523 obsolete/replaced by 6541675 6541675 5437623 5430612, 220V 50/60HZ 6544906 5821700 6545960 5430104 replaced by P/N 5900200 5900200 5780000 ARM VAC 250, 305 X 305 X 20MM;HEPA FILTER ARM VAC 250, 280 X 280 X 20MM;PRE-FILTER P/N 5778000 P/N M5900204 6542432 57792 10