| Image | Supplier | Item Code | Short Description |
|---|---|---|---|
| | GLOBAL O-RING | GOR N8-90-470 | N8-90-470, 470 BACKUP RING, NITRILE 90 DURO BLACK, 21 ID X 21-1/2 OD X 1/4 |
| | GLOBAL O-RING | GOR V8-90-470 | V8-90-470, 470 BACKUP RING, VITON 90 DURO BLACK, 21 ID X 21-1/2 OD X 1/4 C |
| Inside Diameter | 21.004 in |
| Manufacturer | GLOBAL O-RING |
