Sliding glass door wheels

A home owner from Whittier, Ca says:
Stamped on side:
Product of
Del Mar Eng. Co
Long Beach Cal
Pat 3 670.357

L 3 1/8" X W 5/8" (6/8" w flair tab) X H 1 1/8" (w tab 1 3/8")
Screw tab only = 5/16"

Hoping to replace these wheels. Need total of 6 components
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Tom from SWISCO responded:

Hello! I don't think your roller is made anymore, but according to our records you may be able to use our 81-160 as a substitute. Look it over and let me know if you agree, or if you had any follow-up questions!

Alternate image for 81-160
A home owner from Whittier, Ca says:
I agree with you?? I'm going to order 2 and see if they fit. If so, I will order 4 more for my other doors.
Thanks for your help.
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Tom from SWISCO responded:

That's great, thank you very much! Please let me know if you had any other questions.

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