The 48 x 48" Solid Frame Scrim White Artificial Silk from Matthews is made with two "ears" at the bottom that protect fabric when frames are slid in and out of their storage boxes and can be used as a point to tie off when used in certain conditions. 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, and the frame is black powder-coated to minimize reflections.