industrial-seal-kits, jcb
| Model Num | Application | Cylinder | Serial Num | Bore | Rod | Code |
| 525B-4HL | EXTENSION | 556-08300 | M272050 | 70 mm | 50 mm | I-SP-15 |
| 525B-4HL | EXTENSION | 556-12900 | M272000-M276567 | 70 mm | 50 mm | I-SP-15 |
| 525B-4HL | EXTENSION w/ Check Valve | 556-13400 | M272000-M276567 | 70 mm | 50 mm | I-SP-15 |
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