The Kyosho ORG04SSBK pack includes ten black O-rings matched to SS4 parts, a handy supply for regular RC maintenance. They provide consistent sealing where small rubber rings are required in assemblies.
These O-rings serve to maintain seals on moving parts and housings, helping prevent fluid or air loss and keeping performance steady. While built for SS4 configurations, they can be used on other compatible fittings with the same profile.
When installing, use a small amount of silicone grease to aid seating and reduce friction. Check rings during service intervals and swap them out if they show flattening, cuts, or degraded elasticity.
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