Amazon.com: Goshfun 19Pcs 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
Ladrillos MOC piezas técnicas de La bomba neumática pequeña (6L) V2 reforzado con cilindro de 47225 de 19478 4697 Compatible con 8800 bloques|Bloques| - AliExpress
Lego pneumatics - Wikipedia
LEGO® 6099776 - 6152068 - 6156699 19467c01
LEGO bb0875 6152131 Blue Pneumatic Pump Small (6L) V2 with Reinforced Cylinder | electricBricks : LEGO set and parts shop and database