LEGO PART 99021 Pneumatic Hose Connector with Axle Connector | Rebrickable - Build with LEGO
Pneumatic Wheel
Quickun Pneumatic Tubing 12mm x 8mm PU Polyurethane Tube Air Hose Line for Air Compressor Fitting or Fluid Transfer ( Blue 32.8ft/10Meters ) - - Amazon.com