Your part # 81-133 seems to be it. Just wanting to verify before ordering 4 of them
Gary
Casey from SWISCO responded:
March 16, 2021
Hello, I agree that your roller looks similar to our 81-133. Make sure you're measuring the width where the tabs extend from the housing, which is shown as 1" below. As long as the dimensions match up to your part, you should be good to go. Alternate image for 81-133
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