22PCS Hydraulic Pump Kit Compatible With Mainstream Technic Parts, Gear and Axle Set for Building Blocks Model

This is a great set. I got the engine with the gear box and it works perfectly. It is very well designed. I also bought a compatible motor and have been playing with it for days now. I highly recommend.

Purchased for my son who loved building and creating with Legos. He loves them.

Got these for one of my boys. He loves them. Uses them in all sorts of builds.

I had never seen these... only the pneumatic pistons... these are technically a LINEAR ACTUATOR... and they work really well too. This allows me to make some movements that I could not otherwise do... great for experimenting and teaching robotics.

Pretty cool built it fairly quickly but it kinda annoys me that the instructions are on a usb drive but other than that I like it.

My 7 year old built the full engine in the instructions, took it apart, and started incorporating the parts into other designs. He made motorcycle V-twins and inline 4s. These parts were perfect. The instructions, which were discarded, were not too easy to follow.

My son was so excited to receive these for Christmas but the longer rods didn’t work. Will be returning these items

Good value for being an off brand. If you need to use them in pairs don't pair it up with the brand name because they do move at different speeds.

Se me notificó que las "autoridades" negaron su importación, y se reembolsó mi dinero porque dicen que este JUGUETE está prohibido. Si al dinero se le dice NO puede que este se marche para siempre...