Features: 1) Material: PVC 2) Weight: 30g - 1,450g 3) Size: 8cm - 75cm 4) Color: red, yellow, blue, white, black 5) Used to strengthen and tone muscles and bones of the hips, back, legs, hands, arms, and shoulders 6) Helps develop overall body muscle, balance and coordination 7) A great exercise alternative for any age and fitness level 8) Can massage the head