Airstream 1/4" Blue Belt Line Trim Insert, 50 Foot Roll - 200505-01Airstream 1 4" Blue Belt Line Trim Insert, 50 Foot Roll 200505 01 1 4" wide replacement vinyl rub rail insert for Airstream trailers. Maximum roll length is 50 feet. This part replaces 200505. Use with Airstream Aluminum Extrusion 100640 01 (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