This is a specific little but important part – a brand new window mounting clip, complete with its screw. It's made by Robust Car Parts and is designed to fit Peugeot Partner and Citroen Berlingo models, specifically for manual windows. The part references several OEM numbers, including 2839777 and 857379. It's made from rubber and is a crucial piece of the window regulator/motor assembly, helping to secure everything in place. The seller offers a solid 2-year warranty on this part, which is great peace of mind. If your window is rattling, loose, or won't stay up, this clip could be the inexpensive fix you need to get it working smoothly again.