Some model kits are supplied with proprietary servo arms which arevery commonly 25t.With this gear, it is now possible to use such servo arms with JR PROPO servos (Which are all 23t)Bearing: upper/12pi, bottom/10piCompatible model: S8911, S8915, S8911BL, S8912SHV, S8955S, and S8955SH
Metal Gear E T25-1210 for S8911
$21.99Price