Airstream 1/2" Black Belt Line Trim Insert, 50 Foot Roll - 201092Airstream 1 2" Black Belt Line Trim Insert, 50 Foot Roll 201092 1 2" wide replacement vinyl rub rail insert for Airstream trailers. Maximum roll length is 50 feet. Use with Airstream Aluminum Extrusion 101191 (no longer available) Installation Tip: Put the bottom lip into the lower track a foot or so at a time and then pinch the vinyl down enough to slip it into the top track then move on down the line and do a little more. There is no need to try to