2 Hub Caps. Designed to fit a 1/2" axle. Easy to install and will fit snugly on the wheels of your Radio Flyer trikes and wagons that use 7/16” axles. Hub caps are hammered or pressed onto axle. These hubs were sent directly to us, Cloud Nine Toys in Sudbury Massachusetts, by Radio Flyer.

Interesting to note that the hub has an interior star design and the shell diameter is close is 1-5/16".