Following photo shows a BienAir 1600363 Plug which fits above polisher well.

The BienAir plugs beyond 1600363 type do not fit above polisher.for example,

1600081 does not fit above polisher.

1600081 does not fit above polisher.

1600082 does not fit above polisher.

1600083 does not fit above polisher.

1600086 does not fit above polisher.

1600089 does not fit above polisher.