BrickLink - Part 19467c01 : LEGO Pneumatic Cylinder V2 2 x 11 [Pneumatic] - BrickLink Reference Catalog
Goshfun 19Pcs 10-Kinds MOC Pneumatic Parts Bricks with Air Pump Push Rod Switch Piston Air
Goshfun 19Pcs 10-Kinds MOC Pneumatic Parts Bricks with Air Pump Push Rod Switch Piston Air
Exploring Piston Engine Design With LEGO | Hackaday
Build 19 Piece Pneumatic Kits with Technik Parts Contains Air Pump, Piston Pressure Rod, Cylinder,Pneumatic Hose &More,Great for DIY, MOC Tech, Compatible with Lego