Product Name: Barbell BoardStyle: 2.5kg/5.5lbs*2, 5kg/11lbs*2, 10kg/22lbs*2, 15kg/33lbs*2, 20kg/44lbs*2, 25kg/55lbs*2Dimensions (diameter x thickness):2.5kg/5.5lbs: 22*3cm/8.6*1.1in5kg/11lbs: 32* 3cm/12.6*1.1in10kg/22lbs: 36*3.7cm/14.1*1.4in15kg/33lbs：40*4.2cm/15.7*1.6in20kg/44lbs: 45 * 4cm/17.7*1.5in25kg/55lbs: 44.5* 4.6cm/17.5*1.8inAperture: 5.1cm/2 inchesQuantity: 2Material: pure steelPurpose: fitness equipmentFunction: muscle trainingApplicable people: all peoplenotes:1. All our products are taken in kind. Due to the difference between the shooting light and the monitor, a slight chromatic aberration is normal.2. Due to different measuring tools and measuring methods, it is normal for the data size to have an error of 1-3cm. Thank you for your understanding.