G33237 Boom Swing Lift Stabilizer Cylinder Seal Kit Fits Case 430 480B 530 580One New Replacement Cylinder Bore only Seal Kit which fits: Backhoe Boom: 430 with Backhoe Models 21, 22, 23, 480, 480B with Backhoe Models 23, 26, 26B, 26S Backhoe Dipper: 430 with Backhoe Models 21, 22, 23, 480, 480B with Backhoe Models 23, 26, 26B, 26S Backhoe Dipper Ext.: 580 with Backhoe Models 33, 33S Backhoe Swing: 480, 480B with Backhoe Models 23, 26, 26B, 26S Backhoe Bucket: 530 with Backhoe Models 31, 32, 32S, 580 with Backhoe Models 33, 33S