Roller for Patio doors

A handy person from Surrey British Columbia Canada says:
Length 41/2 inches (not including the wheel )
wheel 1 1/4
Hight 1 ½ inch

Have to retrofit 200 apartments
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Bob from SWISCO responded:

Thanks for posting. See our 81-052 Roller Assembly. The diameter of the wheels is slightly larger, at 1-1/2"; but they can be adjusted to make up for the difference. Look over the dimensions again to be safe and let us know what you think.

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