UPDATED] Lego Technic linear actuator performance measurement (including new XL actuators) - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
File:Lego Technic 40918 Linear Actuator (48065588802).jpg - Wikimedia Commons
LEGO MOC Custom Linear Actuator 1 by 2in1 | Rebrickable - Build with LEGO
Lego XL Linear Actuator Kit (technic,cylinder,piston,bracket,robot,power) | eBay
How to Build a LEGO Technic Custom Linear Actuator (Free Building Instructions) - YouTube
LEGO TECHNIC - 2 x Mechanical control cylinder (Linear Actuator) mini with brackets: Amazon.com: Industrial & Scientific