Quadrapoint Hub Cap Replacement Compatible With Popular Red Wagon Brand, Steel & Wood Wagons 1/2' New Black (Not For Plastic Or Folding Or Little Wagons Model W5, Please Read Product Description)This Is A Set Of Brand New Black Axle Caps For A Popular Red Wagon Brand Wagon. They Will Fit Any Wagon With A Metal Set Of 0. 50 Inch (1 2 Inch) Diameter Axles. Each Cap Measures 1. 5' And The Hole Is 0. 50' (1 2 Inch). This Will Not Fit Small, Plastic, Folding Wagons Or Little Wagons Model W5, Only Steel & Wood Wagons That Have A 0. 50' Axle Diameter. Please Double Check Your Axle.