To keep weight to a minimum and yet get maximum strength, all MSE Solid Frames are made of 3/8" thin wall tubing. The mounting pin is solid rod.
The 48" x 48" frames are made with two "ears" at the bottom to protect fabric when frames are slid in and out of their storage boxes or can be used as a point to tie off when used in certain conditions.
Solid Frames are black powder coated to minimize reflections.