This Yokomo R12-18O Shock O Ring is a small-scale replacement part designed for the R12 and GT series remote-control shock assemblies. The set provides spare O-rings intended for routine shock maintenance and for restoring reliable damping behavior after disassembly.
Use these O-rings when servicing shock units to help retain oil and stabilise damping consistency across runs, they are sold as a multi-piece service pack for hobby-grade model maintenance and tuning.
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