To me it looks like this Slide-Co 172581 Sliding Window Roller Assembly with 1/2-Inch Brass Wheel,(Pack of 2)
Casey from SWISCO responded:
March 18, 2021
Hello,
Your roller reminds me of our 87-235 but the wheels have a diameter of 1/2". Take a look and see if the overall dimensions could work for you. Thanks for posting!