Dual Sky DSA-21779 SA-4.0 25T CNC Aluminium 4 Inch Double Servo Arm

The Dual Sky DSA-21779 SA-4.0 is a 25T CNC aluminium double servo arm designed for use with standard 25-tooth spline servos across a wide range of RC applications. Machined from aluminium rather than moulded in plastic, it offers a more rigid connection between servo and linkage, which matters most in high-load setups such as steering, throttle, and control surface linkages. At 4 inches in total length, it suits builds where extended throw or precise geometry is needed.

Key Features

• CNC machined aluminium construction provides greater rigidity and resistance to flex compared to standard plastic servo arms
• 25T spline fitment is one of the most common servo shaft patterns, compatible with servos from a wide range of manufacturers
• 4-inch double arm configuration allows linkage attachment on either side of the servo shaft, useful for symmetrical or dual-pull setups
• Machined finish ensures consistent spline engagement and a secure fit on the servo output shaft