Features: Good corrosion resistance, high toughness, easy to install. Nice DIY item for the RC model car enthusiast. 2 Speeds: the low speed and high speed. Gear ratio: low speed-29:1, high speed-17:1. Motor speed: 28000-30000rpm. 2 speed gearbox with 9g servo for WPL MN JJRC rock crawler rc cars parts. Suitable for WPL C14 C24 B14 B24 B16 B36 MN D90 MN91 MN96 MN98 MN99S MN45 JJRC Q60 Q61 Q62 Q63 Q64 Q65 , 4WD 6WD RC car DIY modification upgrade accessories<br><br>Material: metal+plastic Color: as shown<br><br>Package Contents: 1 x Gearbox 1 x Servo 1 x Motor Heat Sink 1 x Mounting Accessories Set<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.