Rockler. Their stuff fits together and no other parts are interchangable. 4 inches ain't four inches anywhere. No standards for inside, outside dimensions. Since I stopped even trying to match different brands, dust collection has become much easier. I only use Rockler parts now and have no idea if any other brands are OK.
I have had a Rockler 4 inch by 23 foot collapsable hose for at least 10 years and it's holding up nicely. It has a metal coil so you can ground it if you want. Consider that an endorsement.
The more I do, the less I accomplish.