Hot Racing brushless Black steel 48 Pitch 24 Tooth Pinion Gear.
Standard 4140 steel and has been heat treated heavy duty 4mm set screw for brushless power
One 48 Pitch 24 Tooth Pinion Gear with 4mm set screw
Inner diameter: 1/8" (3mm)Length 12mmdescription revised by: WP February 12, 2014