LEGO Technic Pneumatic V8 Engine - Crazy Power! - MOC - With Instructions and Parts List - YouTube
Goshfun 32Pcs 10-Kinds MOC Pneumatic Parts Bricks with Air Pump Push Rod Switch Piston Air Pipe, DIY Small Particle Stem Building Blocks Toy Set Compatible with Lego, Random Color of Air Pipe
technic - Which sets currently contain pneumatic LEGO equipment? - Bricks