Rockler 4´´ Tool Blast Gate
|Control dust collection right at the source with this unique blast gate. It attaches directly to 4"e dust ports on your power tools and features a rubber fitting that not only guarantees a tight connection, but also is flexible enough to accommodate slight variations in the size and shape of the port. The other end is sized to accept standard 4"e hose.
Only $10.99 at Rockler.com