The Savox SH-1290MGP is a super-speed, metal-gear, digital servo that is extremely fast, but does not lack in performance. "Plus" series servos feature Soft Start and Sanwa SSR compatibility.Features:Metal gear train ensures durability and longevity.Extremely fast for quick response.Aluminum middle case allows for cooler operating temperatures.Ideal as a rudder servo on 500, 600, and 700 class helicopters.Dual ball bearing support.Technical Specs:Torque @ 4.8v - 4.0kg/55.5oz-inTorque @ 6v - 5.0kg/69.4oz-inSpeed @ 4.8v - 0.06 sec/60 degSpeed @ 6v - 0.05 sec/60 degDimensions L x W x H (mm): 40.3 x 20.2 x 37.2Weight: 56.4g