These essential O-rings are specifically engineered to provide a critical seal within Kyosho medium-sized shock absorbers, playing a vital role in preventing oil leakage and ensuring consistent damping performance. Crafted from a durable, oil-resistant rubber compound, they create a tight barrier around the shock shaft or within the shock body, which is crucial for maintaining the integrity and responsiveness of your RC vehicle's suspension system. Ideal for routine maintenance or complete shock rebuilds, these high-quality replacement seals restore original factory performance characteristics, leading to smoother operation and more precise handling across diverse terrains and demanding conditions.