Air compressor - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
LEGO MOC Lego Pneumatic Simplex Pump by Hans56 | Rebrickable - Build with LEGO
Amazon.com: 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
File:Lego Pneumatic 26288c01 blue pump (28484758712).jpg - Wikimedia Commons