Compatible with all Kenmore central vacuum systems made in a plastic casing and also with a metal casing: 50455 2050455 20-50455 50500 20-50500 2050500 S107-50601 S107-34088 S107-34089 S107-34087 S107-34090 175.8690390 478369 34604 108-34643 and many other models