To keep weight to a minimum and yet get maximum strength, all Matthews Solid Frames are made of 3/8" thin wall tubing.. The flat edges of these frames make them ideal for quick gel changes with 2 sided tape. Comes in handy when you need to setup diffusion, a bounce, flag a light, or to hold a gel away from hot light(s). 48" x 48" 3/4" Square Tubing Frame, Weight: 3lbs