Mcmaster-Carr 8507K15 Rubber Edge Trim 121' Style 5 In 1/16"x3/8" Out 1/4"x1/2"

New Surplus.
 Inside - 1/16" Wide x 3/8" High
Outside - 1/4" Wide x 1/2" High
Durometer 70A
Extra Flexible
121 Feet total - 100' Roll unopened & 21 Feet opened roll.