HI-TECH FRAMED SERIES 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 G120-1-1 Double Swing G120-2-1 Sliding G120-S-1 Overhead G120-O-1 Fence G120-F-1 Panel G120-F-25 Horizontal Bars Pedestrian G120-1-1V Double Swing G120-2-1V Sliding G120-S-1V Overhead G120-O-1V Fence G120-F-1V Panel G120-1-25 Vertical Bars 44