![10Pcs MOC Parts 4019 High Tech Gear 16 Tooth with Round Holes Compatible Bricks DIY Building Blocks Particle Kid Brain Toy Gift|Blocks| - AliExpress 10Pcs MOC Parts 4019 High Tech Gear 16 Tooth with Round Holes Compatible Bricks DIY Building Blocks Particle Kid Brain Toy Gift|Blocks| - AliExpress](https://ae01.alicdn.com/kf/H8a1893c7e1944ee9bf51114726ac3183R/10Pcs-MOC-Parts-4019-High-Tech-Gear-16-Tooth-with-Round-Holes-Compatible-Bricks-DIY-Building.jpg_640x640.jpg)
10Pcs MOC Parts 4019 High Tech Gear 16 Tooth with Round Holes Compatible Bricks DIY Building Blocks Particle Kid Brain Toy Gift|Blocks| - AliExpress
![BrickLink - Part 4019 : LEGO Technic, Gear 16 Tooth (First Version - 4 Round Holes) [Technic, Gear] - BrickLink Reference Catalog BrickLink - Part 4019 : LEGO Technic, Gear 16 Tooth (First Version - 4 Round Holes) [Technic, Gear] - BrickLink Reference Catalog](https://img.bricklink.com/ItemImage/PN/86/4019.png)
BrickLink - Part 4019 : LEGO Technic, Gear 16 Tooth (First Version - 4 Round Holes) [Technic, Gear] - BrickLink Reference Catalog
![Part 4019 : Technic, Gear 16 Tooth (First Version - 4 Round Holes) [Technic, Functional:Technic, Gear] [BrickLink] Part 4019 : Technic, Gear 16 Tooth (First Version - 4 Round Holes) [Technic, Functional:Technic, Gear] [BrickLink]](https://img.bricklink.com/ItemImage/PN/9/4019.png)
Part 4019 : Technic, Gear 16 Tooth (First Version - 4 Round Holes) [Technic, Functional:Technic, Gear] [BrickLink]
![BrickLink - Part 4019 : LEGO Technic, Gear 16 Tooth (First Version - 4 Round Holes) [Technic, Gear] - BrickLink Reference Catalog BrickLink - Part 4019 : LEGO Technic, Gear 16 Tooth (First Version - 4 Round Holes) [Technic, Gear] - BrickLink Reference Catalog](https://img.bricklink.com/ItemImage/EXTN/25191.png)