Technic, Gear 16 Tooth (First Version - 4 Round Holes) : Part 4019 | BrickLink
Bricker - Construction Toy by LEGO 4019 Aeroplane
1x LEGO® Technic rack 1x13 black 64781 steering lift arm 99773 4019 | eBay
LEGO Lunar New Year Ice Festival 80109 Building Kit; Gift Toy for Kids Aged 8 and Up; Building Set Featuring a Detailed Winter Scene, Chun Ice Sculpture, 13 Minifigures and More (1,519 Pieces) - Walmart.com
LEGO Red Gear with 16 Teeth Unreinforced (4019) | Brick Owl - LEGO Marketplace
LEGO Dark Turquoise Gear with 16 Teeth Unreinforced (4019) | Brick Owl - LEGO Marketplace
LEGO Dark Turquoise Gear with 16 Teeth Unreinforced (4019) | Brick Owl - LEGO Marketplace
Technic, Gear 16 Tooth (First Version - 4 Round Holes) : Part 4019 | BrickLink
LEGO PART 4019 Technic Gear 16 Tooth with Round Holes [Old Style] | Rebrickable - Build with LEGO
Technic, Gear 16 Tooth (First Version - 4 Round Holes) : Part 4019 | BrickLink