Mechanisms Pneumatics Add-On Set : Set 9641-1 | BrickLink
Build 35 Piece Pneumatic Kits with Technik Parts Contains Air Pump, Piston Pressure Rod, Air Lines, Pneumatic Parts Perfect for DIY, MOC Tech, Compatible with Lego
Amazon.com: TOYGA 30 Piece Pneumatic Kit Air Pressure Tanks Air Pressure Gauge Accessories Technology Pieces and Parts MOC Spare Parts Compatible with Lego : Toys & Games
LEGO 9641: Pneumatics Add-On Set | Brickset: LEGO set guide and database
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