A beautifully-designed LEGO pneumatic compressor | Arduino Blog
Lego Pneumatic AIR TANK (technic,tubing,hose,air,tank,cylinder,storage,switch) | eBay
LEGO Blue Pneumatic Airtank 67c01 - Technic 8439, 8464, 8459, 8462, 8299 Tank | eBay
LEGO Blue Minifig Air Tanks (3838 / 90226) | Brick Owl - LEGO Marketplace
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