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
Pneumatic AIR TANK KIT PRO with cylinder,pump,etc (Hose is compatible with Lego) | eBay