Airstream Belt Line Insert, Blue 1/2in 50ft 201089-01

201089-01 Airstream  Belt Line Insert, Blue 1/2in 50ft. Fits into belt line around the middle of the trailer. Used on trailers from 1974 to 1977. 1/2 " Measurement listed is the amount of vinyl insert that you can see when insert is installed in track. This is the measurement Airstream uses. Actual overall measurement of complete vinyl insert is 11/16 ". See pictures below.