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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
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BrickLink - Part x189c01 : LEGO Pneumatic Cylinder with 2 Inlets Small (32mm) [Pneumatic] - BrickLink Reference Catalog
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BrickLink - Part 21828c01 : LEGO Pneumatic Cylinder V2 1 x 11 [Pneumatic] - BrickLink Reference Catalog
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Pneumatic Cylinder Disassembly & Lubrication Findings - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
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BrickLink - Part 19475c01 : LEGO Pneumatic Cylinder V2 1 x 5 [Pneumatic] - BrickLink Reference Catalog
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Moc Bricks Technical Parts Pneumatic Pump Small (6l) V2 With Reinforced Cylinder 47225 19478 4697 Compatible With 8800 Blocks - Blocks - AliExpress
![BrickLink - Part 21828c01 : LEGO Pneumatic Cylinder V2 1 x 11 [Pneumatic] - BrickLink Reference Catalog BrickLink - Part 21828c01 : LEGO Pneumatic Cylinder V2 1 x 11 [Pneumatic] - BrickLink Reference Catalog](https://img.bricklink.com/ItemImage/PN/3/21828c01.png)