SPECIFICATIONS

Material: Silicone

Product Size: Thickness: about 25mm/0.98 inches

Diameter: about 78.5mm/3.09 inches

Weight: about 75g

(20-30 lbs) LB=(9-14)KG is suitable for children and people who need hand recovery training

(30-40 lbs) LB=(14-18)KG is suitable for elementary school and old people as well as little girls

(40-50 lbs) LB=(18-23)KG is suitable for middle school and ladies

(50-60 lbs) LB=(23-27)KG is suitable for high school and college and office men

(70-80 lbs) LB=(32-36)KG is suitable for men with a good fitness base or greater strength