The Hirobo collar identified as HI2521128 bears the 3 x 8 x 15 mark and is intended as a compact locating component for model helicopters. It is suitable where small collars are needed to keep rotating or sliding parts in position within the assembly.
During setup, the collar's purpose is to stabilise positional relationships between paired components in drive or linkage systems. Fitment is typically confirmed by matching the marked dimensions to the shaft or linkage on your model before fitting.
This item is stocked as a spare for routine servicing and minor repairs, classified under helicopter general parts rather than a dedicated kit. Verify compatibility with your model's parts list prior to purchase.
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