Capitol 930 Series Patio sliding Door Roller Assembly, Flat 1inch Diameter Steel Wheel.
Used on old capitol doors, maybe the 930 series.
1 inch flat steel ball bearing roller unit
Adjustable steel housing assembly
Housing Tab Style: Plain Back
Housing Width: 19/32-inch
Roller Diameter: 1-inch
Roller Edge Type: Flat
Roller Material: Steel
Roller Width: 5/16-inch
Width: 19/32-inchHelpful Article:How to Replace Rollers in an Aluminum Sliding Glass Door
This product is similar to or the same as the following part numbers in these brands:
Strybuc Industries: 900-9469