MIXED About SKU - (Stock Keeping Unit) SKUs are unique identifying codes for each of the items we offer. We created our SKUs based on various characteristics of our products. We use them as a system to differentiate and categorize our products efficiently. You can request a specific model by referring to its SKU. Pedestrian G120-1-25 Double Swing G120-2-25 Sliding G120-S-25 Overhead G120-O-25 Fence F120-F-25 Panel P120-F-25 Combination 24x100 and 24x40 Pedestrian G120-1-17 Double Swing G120-2-17 Sliding G120-S-17 Overhead G120-O-17 Fence F120-F-17 Panel P120-F-25 Combination 24x24 and 24x160 Pedestrian G120-1-4V Double Swing G120-2-4V Sliding G120-S-4V Overhead G120-O-4V Fence F120-F-4V Panel P120-F-25V Combination 24x220 and 24x120 17