Tri-Fold Screen is made of heavy wall schedule 40 aluminum 1.9" O.D. pipe. Main 8" x 8" Screen with two 8" x 4" wings provides overall 8"H x 16"W protection. Includes two 8" transport wheels. Wings easily fold in for transport & storage. All slip-on double netting is #60 (3 mm) weather treated, 1-3/4" black mesh. Ideal for 2nd Base/Inflield protection.