Amazon.com: 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 : Industrial & Scientific
Pneumatic Cylinder with 2 Inlets and Rounded End Medium (48mm) : Part 47224c01 | BrickLink
Amazon.com: 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 : Industrial & Scientific
Amazon.com: LEGO Technic 4 pcs NEW YELLOW MINI PNEUMATIC PISTON CYLINDERS Air pressure Pump pack lot set switch hose small little robot robotics : Toys & Games
LEGO 5116 Technic Pneumatic Piston Cylinder 32 mm | BrickEconomy
Mould King Pneumatic Parts – Your World of Building Blocks
LEGO part 2793c01 - Yellow Pneumatic Cylinder with 2 Inlets Medium (48mm) with Black Top at BrickScout