Manufacturer: SHS High Speed Gears Gear Ratio: 16:1 CNC Machined For Version 2, 3, and 6 Gearboxes You can't describe SHS gears without using the words tough, reliable, and affordable. For ultra high torque and speed setups, techs love the toughness of SHS gear sets. Some of the craziest setups out there use them (with other SHS parts of course). Their reliability comes from the high precision manufacturing process where they are CNC machined. However, their affordability separates them from the rest of the pack. Most people don't know you can have the performance of these gears at this kind of price. Perhaps this explains SHS's growing reputation among both technicians and the common airsofter for doing a high performance upgrade or a reliable repair. Suggestions For Use Must use appropriate high speed parts with these gears. We suggest you use an M120 spring or below. A full teeth piston is required for these gears.