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
Technic Parts for Lego Kit Pneumatic pump Small 6L V2 19476 Building Blocks Sets | eBay
technic - Which sets currently contain pneumatic LEGO equipment? - Bricks