This is a super way to dress up your Beckson GH43 series cup holders. The GH42 aluminum insert slips snugly into the cup holder and will stay in place until you need to remove it to clean it. The domed rim hides the plastic cup rim completely. The plastic cup and aluminum insert can be purchased at the same time. The standard anodized colors are gloss clear or flat black. Colors are powder coated and available for any RAL number and finish.