Amazon.com: Goshfun 19Pcs 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
Custom Pneumatic cylinder V2 ~ JaapTechnic
LEGO Red Technic Pneumatic Cylinder Old 48mm with Black Piston (4 Studs Long) | Brick Owl - LEGO Marketplace
Mission Possible/Pneumatics - Wiki - Scioly.org
Lego Technic Bricks Powered UP Large Linear Actuator Piston Cylinder 40918 NEW | eBay
2 Lego Pneumatic MINI Cylinders (technic,pump,air,tank,switch,fittings,hose) | eBay