PUNCHED BAR CHANNELS FOR WROUGHT IRON FENCES 1 -1/2" x 1/2" x 1/8" (Punched for 1/2" Squares) 4" On Center (3-1/2" Space) 4-1/2" On Center (4" Space) 1-1/2" x 1/2" x 1/8" (Punched for 5/8" Squares) 5" On Center (4-3/8" Space) D. Wexler can produce custom punched channels. Available upon request. Although Wexler makes a thorough effort to keep stock on all inventory items listed, some items may not be immediately available in stock at Wexler.