If your starting out or a seasoned fully equipped woodworker, this is one piece of equipment, that you will wonder how you ever did without. At first I was disappointed like so many others that their wasn't even a tube mount on the head to hook up your hoses to. It is really nothing more than a stamped out piece of plastic that will accept your 4" hoses. After going through the duct tape, and band clamps, with less than stellar results, I came to the conclusion (duh) that the coiling action of a 4" hose is the right size to wind it into the opening. Thereby creating a screw the hose in, effect. I also used the 4" Jet wire clamps on the inside, just to make sure it would not gradually slip out. The fit is rather tight, and leaks very little air. No tape or anything else is neccessary. Makes for a clean professional looking fit. Wish they had put that in the instructions to begin with. It seems so obvious now, but who would know then?