This wheel kit allows you to move your dog carrier quickly. The wheels can be mounted in an instant, thanks to the special screws and easy assembly instructions included in the package. Depending on which model of pet carrier for dogs you have or you own or intend to buy, you will find the most suitable kit. The L388 kit is perfect for the larger pet carriers, like Atlas 70. All sets contain 4 wheels, 2 fixed wheels and 2 pivoting wheels with brake.