Mould FanMei 35 pneumatic kits are compatible with Lego, including 10 types of technical pneumatic cylinders, MOC air pump piston pressure rods, suitable for crane van spare parts set : Amazon.co.uk: Business,
Pneumatic Cylinder with 2 Inlets Small (32mm) : Part x189c01 | BrickLink
LEGO part 47224c01 - Yellow Pneumatic Cylinder with 2 Inlets and Rounded End Medium (48mm) at BrickScout
Amazon.com: Goshfun 32Pcs 10-Kinds MOC Pneumatic Parts Bricks with Air Pump Push Rod Switch Piston Air Pipe, DIY Small Particle Stem Building Blocks Toy Set Compatible with Lego, Random Color of Air
LEGO Double-Acting Pneumatic Piston Cylinder 48 mm Set 5108 | Brick Owl - LEGO Marketplace