These are the 2-1/2" Diameter Vintage II 1/12 Scale Aircraft Wheels from Williams Brothers Model Products. FEATURES: Black Rubber Tire Vintage Style Wheel Wheel Constructed of Beige Plastic INCLUDES: Two 2-1/2" Vintage II Style Wheels REQUIRES: Installation on landing gear of aircraft SPECS: Inner Diameter: 2.5mm (0.10") Outer Diameter: 62.65mm (2.5") Width: 13.65mm (0.54") Hole Diameter: 2mm (0.08") Williams BrothersPart WBR12940