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Choose between the four gear ratios offered by this assembly type gearbox, to ensure that your model is powered just how you want it. Gears, case and crank arms are precision plastic parts, and paired with durable metal shafts. The gearbox is compact, even with motor installed, making it great for projects from cars to tanks, robots and much more! Use the included crank arms to achieve a greater range of motion.
• Uses a tough clear ABS resin case.
• 12.7:1, 38.2:1, 114.7:1 and 344.2:1 gear ratios.
• Features left and right 3mm hex output shafts.
• Type 130 motor included