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LEGO part 47224c01 - Yellow Pneumatic Cylinder with 2 Inlets and Rounded End Medium (48mm) at BrickScout
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How to Make a Small High RPM 1 Cylinder Lego Pneumatic Engine - 3000 RPM! - Smallest in the World!? - YouTube
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Smartable Technical Two Way Pneumatic Cylinder Building Block Moc Parts Toys For Kids Gift Compatible 47225/63855 2pcs/lot - Blocks - AliExpress
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LEGO Red Technic Pneumatic Cylinder Old 48mm with Black Piston (4 Studs Long) | Brick Owl - LEGO Marketplace
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