And this type of dumbbell is unisex, the training difficulty is free to control, suitable for a wide range of people, can be used in fitness muscle groups or with aerobic training. Dumbbell accessories: 30 kg (dumbbell piece 12, nut 4, dumbbell rod 2 length 37cm, Barbell Connecting Rod 1 length 29.5cm). Dumbbell piece size: 2.5kg8diameter 14cm, 1.25kg4 diameter 11.5cm, 0.5kg4 diameter 9cm. We are manual measurement, there may be 1-2CM error, please refer to the actual product, please understand. The product picture is a physical picture, but due to shooting technology, lighting, display parameters and other factors, the actual color and picture will be different, please refer to the actual product.It is fast, Easy and Safe. It will give us more energy and. Passion to do the work better.