Roller Wheels for a sliding glass patio door

A handy person from Pittsburgh PA says:
There was something printed on the part that said Del Mar Eng Cal
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Tom from SWISCO responded:

Hello! Your roller here looks like a good match for our 81-033. Look it over and let me know if you agree, or if you had any questions!

Alternate image for 81-033
Alternate image for 81-033
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