Don't know, but I bet this will fit it...

http://www.deltaportercable.com/Prod...oductID=13279#

wrote:
Have something to ask to someone who owns a Porter-Cable New Plunge
base of
890 router.
The plunge base has a dust port that can be connected directly to dust
hose.
I want to know the diameter of dust port.

Thanks in advance,

Mickey