Models GHS37A (3.7 g) and GHS43A (4.3 g) ultraminiature servos for RC aircraft control. Compact, lightweight servos designed for precise control of rudders, ailerons, elevators and other control surfaces in small electric airplanes and helicopters. Key benefits Extremely light and compact for minimal impact on aircraft weight and balance. Fast response and stable output for precise control in aerobatic and indoor flying. Easy to install with standard JR plug and included mounting hardware. Compatible with a wide range of micro and parkflyer airframes where space and weight are limited. Applications Small electric helicopters and 200 class models for tail and cyclic control. Handlaunched gliders, Mini Skywalker and KTtype foam airplanes for aileron and rudder control. 3D indoor models, F3P, EPP and other lightweight airframes that require compact, reliable servos. What you get in the package (per servo) Servo x 1 Rudder arms x 4 Mounting screws x 3 Common features and specifications Models: GHS37A (3.7 g) and GHS43A (4.3 g) Structural material: Plastic gear with hollow cup motor Connection lead length: 15 cm Operating voltage: 4.8 to 6.0 V. Do not exceed 6 V. Working current: less than 300 mA Speed: 0.12 sec per 60 degrees at 4.8 V; 0.10 sec per 60 degrees at 6.0 V Torque: 0.6 kg/cm at 3.6 V; 0.8 kg/cm at 4.8 V Working angle: 90 degrees Control signal: standard 1000 to 2000 microseconds Deadband setting: 4 microseconds Operating temperature range: 0 to 60 C Connector: JR plug Wire polarity: black is positive, red is negative, white is the signal line Additional packing/logistics (4.3 g) Package dimensions: 13 cm x 8 cm x 9 cm Package weight: 0.1 kg per piece Notes and installation tips Use within the specified voltage range to avoid damage. Confirm wiring polarity before powering; wire color mapping follows the listed convention. The included control horns and screws fit common control link setups for small RC models. These servos provide a balance of low weight, compact size and dependable performance for a wide range of micro and parkflyer aircraft control needs.