Profile: Matex Products Inc. provides planetary gear systems, which are used in a multitude of industrial and consumer product applications. We offer a module design with significant improvements over conventional planetary gears by adding a roller-and-ring mechanism that lowers the gear's cost & gives drive efficiency at multiple stages of reduction. Output shafts are available for most modules. Spacers are available and are used to give the correct spacing when coupling various ratio modules to obtain desired reduction.