Hub Caps for Popular Red Wagon Brand Model 12 Classic Infant WALKER Wagon, 1/4 inch. This is a set of 4 brand new red axle caps for a Popular Red Wagon Brand Classic Walker Wagon with installation instructions. If you have any questions please feel free to ask. Part SKU: 102765 Red Each cap measures 3/4 inch diameter across the base. Hole has a 1/4 inch diameter opening. For use on current popular red wagon brand including: - Model 12 Classic WALKER Wagon THIS WILL ONLY FIT Classic WALKER Wagon THAT HAS A 1/4 inch AXLE DIAMETER. PLEASE DOUBLE CHECK YOUR AXLE. NOTE: This is for a WALKER WAGON, not a big wagon. **Includes installation Instructions