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 8H x 16W 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 protection.