Gearboxes for that scratch-built, or do-it-yourself project. Combine these with the other kits and construction materials for a complete robot or vehicle! Gearboxes use the science of mechanical advantage to reduce or increase RPM, or to reduce or increase torque - you decide! We offer a wide range of different gearboxes to suit just about every need. Educational as well as fun to build! These kits are finely crafted out of plastic, metal, and rubber parts. Instructions are in a pictorial type format making it easy for kids, adults, or anyone else to assemble regardless of their language! Some of these kits even include a tube of grease for the mechanical parts! You simply can't beat the quality of Tamiya kits! New: Single Gearbox, and Double Gearbox. Single Gearbox $14.99 Double Gearbox $19.99 3 Speed Crank Axle $13.99 Twin Motor $16.99 Universal $13.99 4 Speed Crank Axle $14.99 Planetary $22.99 High Speed $17.99 High Power $17.99 Worm Gear $17.99 Six Speed $19.99 Selectable $19.99 2 in 1 (economy) $9.99 Copyright © 2003-2008 E-Clec-Tech. All rights reserved. All other materials and logos are copyrighted by their respective owners, or companies.