Window roller for Stegbar window

A home owner from Australia says:
January 30, 2021
No markings or numbers at all on this roller! Any help appreciated in identifying it. The window brand is Stegbar and they are quite old. Thanks!
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Bob from SWISCO responded:
February 2, 2021

This might be our 87-016; but compare an undamaged version to the dimensions we list on the shop page, and see if you agree. 
Sliding Window Roller, 1/2" Flat Nylon Wheel
Sliding Window Roller, 1/2" Flat Nylon Wheel
87-016
$4.20
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