sliding glass door rollers 31761

A home owner from Bowie, MD says:
Today I tried replacing the original sliding glass door rollers 81-128 purchased from Swisco.

I've attached to this email pictures of the correct ones needed for replacement. The number stamped on the roller is #31761.

The measurement from screw hole to screw hole is approximately 6 inches.
User submitted photos of patio door rollers.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting. Have you seen our 81-018 yet? This looks like a closer match. See what you think.
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