So here's a weird one: trying to order some 800mm Gravity Light bars for a customer at my shop, but I'm finding 2 different versions of the bars listed on QBP and BTI, and I can't tell what the difference is. One is vendor part # 180-1123, and is listed as the 800mm width, 25mm rise. These are obviously what I need to order, but they are completely sold out from both distributors. The other Gravity Light bars that QBP has available are vendor part # 180-1125, and are listed as having all the same dimensions, but the description says they have "set-back rise." I have no idea what this means, and I need to find out if these are in fact the same bars so I can order them for the customer. A Google search of the vendor part numbers got me nowhere. Any ideas?