These are the 2-1/2" 1/12 Scale Diameter Golden Age Aircraft Wheels from Williams Brothers Model Products. FEATURES: Black Rubber Tire Smooth Contour Style White Plastic Wheel INCLUDES: Two 2-1/2" Smooth Contour Wheels REQUIRES: Installation on landing gear of aircraft SPECS: Outer Diameter: 63mm (2.5") Width: 8mm (0.31") Hole Diameter: 2mm (0.079") JiM 11.25.08 ir/jxs