CYS-S8218 Digital 6V-7.2V 0.18sec/60&deg;a 164g Metal Gear 40KG High Torque Servo Speed :0.20sec/60degree at(6.0V) 0.18sec/60degree at(7.2V) Torque:38kg.cm.at(6.0V) 40kg.cm.at(6V) Voltage:4.8V-6V digital servo, big rc servo, use for rc car