Seal Kits for Hanna Hydraulic cylinders. All Seal Kits are manufactured to meet the demanding requirements of industrial, mining, logging, refuse and construction equipment applications. The O-Ring Store LLC Seal Kits are directly interchangeable with those of original equipment manufacturers and meet or exceed the needs and expectations of our customers. The original equipment manufacturers (OEM) names and part numbers are used for reference purposes only. The O-Ring Store LLC does not imply that any part shown is the product of these manufacturers.