I believe it's this kit: https://www.elecrow.com/4wd-smart-car-robot-chassis-for-arduino-servo-steering.html https://www.elecrow.com/4wd-smart-car-robot-chassis

I believe it's this kit: https://www.elecrow.com/4wd-smart-car-robot-chassis-for-arduino-servo-steering.html https://www.elecrow.com/4wd-smart-car-robot-chassis-for-ardu.... It's been around a while, I got one around the time covid started. It's decent quality, although IIRC the front wheels don't have bearings.