This is the pack of 12, 13 and 14 Tooth Mod 1 Steel Pinion Gears from Novak. **Will not work with 32P spur gears used on the Traxxas E-Maxx** **or HPI E-Savage.** FEATURES: Hardened steel construction Recommended when converting 1/8-scale nitro off-road vehicles for brushless electric use Fits Mod 1 spur gears commonly found on 1/8 scale nitro vehicles Compatible with Novak"s HV High-Voltage Brushless Motors and other brushless motors with a 5mm output shaft Allows driver to experiment with different gear ratios Number of teeth stamped on back of each gear INCLUDES: One each 12, 13, and 14 tooth Mod 1 Steel Pinion Gears and three 4x4mm set screws REQUIRES: Installing on motor shaft and tightening set screw SPECS: Inside (shaft) Diameter: 5mm Pitch: Mod 1 COMMENTS: Also available as a 9, 10 and 11T set, NOVC5120 jxs 01/20/09 ir/jxs