Made of low carbon alloy steel after heat treatment.The shear stress grade of the axle is 10.9Gpa. Tensile strength is 1000MPa.Yield ratio is 0.9 Diameter: 12mm/0.47″ | Axle lenght: 330mm/12.99″ | Over all lenght??341mm/13.43″ Axle Length from the shoulder to the thread 330mm /12.99 inches. Package Content: 1 Pc axle;3 Pcs bushing. Please Check The Axle Length Carefully Before Your Purchase Please feel free to contact us if you have any question, we will reply within 24 hours.Product Description Fits:12mm classic rear axle.Please Compare Our Product Against Yours, Including Its Appearance, Size,Shape Before Ordering.Thank You.