Sav&ouml;x SW1211SG Waterproof Coreless Digital Servo .10/208.3 with Aluminum Mid Case Combines leading edge technology with super high 12 bit (4096) resolution Coreless motor provides high speed, incredible efficiency, and low power consumption Extremely strong steel gears ensure long-life and durability The aluminum case design not only looks good but also allows for cooler and smoother operating temps Ideal for RC cars, trucks, buggies, and boats