81-155 Tandem Roller Assembly

A professional from Berkeley, CA says:
I would like to use this roller assembly for a new project. I need to know how much the adjustment height movement is. I will need up to 1/4 inch.

Can this product provide it and if not would the 81-087 do the job.

Otherwise to you have any product that will work.

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Paul from SWISCO responded:
Hello, Dean. The 81-165 tandem rollers are designed for doors weighing up to 150 lbs., while our 81-052 can carry doors up to 250 lbs. The wheels are 1.5" in diameter, the housing height is 1.5", and the width is 13/16". The adjustment range is 3/4".
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