Nothing bad to say. I used this on a grizzly bandsaw with two dust holes. One just under the table, the other at the bottom of the lower wheel cover. I use 4 inch corrugated tubing that I buy in 50 foot spools. It goes very well with these plastic fittings. And it does not shrink in length under the action of vacuum. It requires a band clamp and I cut slits in the hose. ends so it can be squeezed with a clamp. I'm giving this a 4 start as the length of the fittings the hose connects to can be longer for a stronger or double clamp connection.