***NOT FOR PLASTIC WAGONS, FOLDING WAGONS OR Little Wagon MODEL W5 & 9A *** Compatible with 1/2 inch diameter metal axles NOT 7/16" axles. DOUBLE CHECK your axle size **other sizes available like 7/16" which is slightly smaller**. Each cap measures 1.5" and the hole is 1/2 inch For use on Popular Red Wagon Brand Steel & Wood wagons ONLY (NOT for Plastic, Folding Wagons OR Little Wagon Model W5) For current Wagons: Model 18 Classic Red Wagon, Model 22 Trav-ler Wagon, Model 22W-100 All-Terrain Wagon, Model 24 Town & Country Wagon, Model 29 All-Terrain Cargo Wagon, Model 32 All-Terrain Steel & Wood Wagon, Model 89 34" Red Steel Wagon, Model 93B Ranger Wagon, Model 1800 Big Red Classic ATW, Model 75 Garden Cart Includes replacement instructions. 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.