Seems to match your 81-175 except wheel diameter on 81-175 is 1 1/2 mine is 1"
and material is nylon. would these work or do you have exact match. If nylon is a quieter choice that would be great. Any help would be appreciated Thank You.
Paul from SWISCO responded:
May 8, 2015
The dimensions are very close to our 81-056 assembly. Could you use this instead? Check it out and see what you think.