Size reference : 20kg inside and outside diameter 4-7cm 30kg inner and outer diameter of 3.8-7.2 cm 40kg inner and outer diameter of 3.5-7.6 cm 50kg inside and outside diameter 3.2-7.3cm 60kg inside and outside diameter of 4.2-8.8                            

Function and effect of

1 , anaerobic respiration is strong with regular , skinny abdomen .

2 , arm, big, strong, and exposed veins, muscles visible, show the men's masculinity.

3 , easy carrying<span style= "color:#4c33e5;font-siz open knee pads, effective protection for the knee joint. Shop address: Yiwu international trade city H2-25855 67th second floor at Gate 6, 0579-85165855 Street