Savox .15/277 Black Edition Coreless Digital Servo, Standard Torque(@6v): 277.7 oz-in Speedboat): 0.15 sec/60 Dimension lxwxh(mm): 40.3x20. 2x37. 2; weighted): 52.4 Sleek new unique black design with laser etching and a shorter 200mm black shielded wire lead make these servos standout! Coreless motor driven, Nominal operating voltage 4.8-6.0V Drivetrain: titanium Alloy and aluminum; Spline: 25T; bearing: 2BB; case: anodized aluminum body Ideal for steering applications in 1/8 scale buggies, Monster trucks and rock crawlers