Our Model 200, 18"H x 24"W Double Rider Slip-In Sign Frame features include: No Bolts, No Screws! - 42 inches high, constructed of 3/4" structural steel angle. Powder-coated in your choice of white or black. Sign panels slide in. Main Panel Space - 18"H x 24"W. Can accommodate materials up to 1/4 inch in thickness. Two Rider Spaces - 6"H x 24"W special feature riders and name riders are held securely with our spring loaded clips. No hardware needed!