This is an RC-scale replacement damper rubber designed for the Hirobo Freya FFZ-III damper assembly. The part functions as the elastic element inside the damper stack and is intended for normal maintenance or tuning adjustments to helicopter suspension and vibration isolation components.
Fitment is straightforward for experienced hobbyists: remove the damper cap, inspect pistons and seals for wear, swap in the new #60 sleeve, and reassemble while confirming smooth travel and correct preload. Use compatible damper oil and standard damper rebuild procedures; do not force parts that do not align.
From a tuning perspective, the rubber sleeve changes damping feel and small-amplitude response. The "#60" tag denotes a specific hardness characteristic used by Hirobo to balance compliance and rebound control; changing to other hardness options is a common method to refine handling and reduce unwanted vibration in RC helicopters.
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