PQ12 Linear Servo 63:1 Gearing, 20mm Stroke, Hardware Kit Included, Servos & Parts - Amazon Canada
Actuonix L12-50-210-6-R Micro Linear Servo Actuator for RC and Arduino with 3-Wire Connection and Linear Motion, Actuator Hub 50 mm, Gear Ratio 210:1 Max. Voltage: 6 V: Amazon.de: Toys & Games
Actuonix PQ12-63-6-R Micro Linear Servo Linear Actuator for RC and Arduino with 3 Wire Connection and Linear Movement, Actuator Hub 20 mm, Gear Ratio 63:1, Max Voltage 6 Volt: Amazon.de: Toys & Games