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 Pipe
High Tech Parts Blue Pneumatic Pump Small (6L) V2 with Reinforced Cylinder 19475 2793C01 1x5/2x6 Compatible with MOC 8800 Blocks|Blocks| - AliExpress
Smartable Technical Two Way Pneumatic Cylinder Building Block Moc Parts Toys For Kids Gift Compatible 47225/63855 2pcs/lot - Blocks - AliExpress