Door roller identification

A contractor from California says:
June 11, 2019
Guessing mid 60s patio door
Plastic
No markings
Located in central California
Door is original to the home
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Paul from SWISCO responded:
June 18, 2019

Hi there and thank you for posting with images. I believe the closest match we offer is our 81-248 patio door roller. Take a close look. Review our measurements carefully and compare them with yours. If your measurements differ in any way, get back to us and let us know. 
Traco Sliding Patio Roller, Flat
Traco Sliding Patio Roller, Flat
81-248
$12.99
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