LEGO 6 Yellow Technic Engine Pistons with Connecting Rods NEW 42043 | eBay
46pcs Technical Linear Actuator Pro Kit Cylinder Piston Power Functions Robot Car Gear Axle Set Compatible with Lego 61904 92693|Model Building Kits| - AliExpress
Mine Loader 42049 | Technic™ | Buy online at the Official LEGO® Shop US