No markings. Wheel is about 7/8 inch in diameter. About 4 inches total length. Same wheels, 2 on top and 2 on bottom. Metal with ball bearings.
Tom from SWISCO responded:
October 4, 2021
Hello! I recommend our 84-062M screen door roller. This looks like a great match for your original. We also sell the nylon wheel 84-062 if you think corrosion might be an issue down the line. It's up to you!