The Hirobo HI2525012 D5mm ball pack contains ten small replacement balls designed for RC helicopter control linkages where a D5mm ball and 9.5mm height are required. These items are intended as general replacement parts for routine service.
Use these balls in compact linkage joints or small rotating connections that call for a low-profile ball. Always confirm the mating socket size and the required retention method on your craft before fitting to avoid unwanted play.
For reliable control response, inspect all related linkage components and replace any worn mates in sets; matching geometry across joints helps keep tuning predictable and control inputs consistent.
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