Capitol Roller Assembly, Flat 1 inch Steel Wheel

Part Number: 13302
Price: $12.95
Capitol 930 Series Patio sliding Door Roller Assembly, Flat 1inch Diameter Steel Wheel. Used on old capitol doors, maybe the 930 series. Priced in Pairs, Sold in Pairs

Helpful 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