Great idea.
I was sceptical of how ridged these would be once attached to tent poles. Fits the normal 16mm poles.  i.e. marshydro,viparspectre,maxsisun. Snaps onto pole firmly and 1/2 inch pvc fits snug as well. So glad I found these versus buying 3 ft and 4ft. I can use them in any size tent. They perform well at not allowing negative pressure to cramp the girls style.
Rating: 5 stars