Typically, it includes various seals and components designed to prevent fluid leakage and protect internal parts. Key components often found in a seal kit include O-rings, which create seals at interfaces; backup rings, providing additional support to O-rings; piston seals, ensuring a tight seal around the piston; and rod seals, preventing fluid from leaking out of the cylinder. Dust seals or wipers keep contaminants out, while wear rings or guide rings reduce metal-to-metal contact. V-rings and U-cup seals offer dynamic and tight sealing, respectively. Buffer seals absorb shock and pressure spikes, and scrapers remove contaminants from the rod. Seal retainers hold seals in place, and gaskets prevent leakage at joints. Installation tools and an instruction manual are often included to aid in proper installation and maintenance.