Powerweb 14in Combo Hand Exerciser Red Blue Jobst ActiveWear 20 30 Knee Hi 5v Rechargeable battery or 2 01804 5v Rechargeable battery or 2 C batteries * Soft Blue * 16 x 9 x 2 Shipping Carton Size: 16 L x 14 W x 4 H *Theraband© Stability Trainer is used to improve motor skills and balance particularly among the elderly and for knee back and ankle rehab * Two foam pads of different densities and one air filled cushion allow users to work through progressive levels by standing on a pad * The green Stability Trainer is firm and provides a beginning level of challenge * The blue Stability Trainer is soft and introduces an increased level of challenge to the user * For maximum challenge use the new extra soft black Stability Trainer LARGE 14 DIAMETER * Red Blue* Light Heavy * Flexion extension opposition and supination exercises can be performed using the exercise web * Resistance may be modified by adjusting the hand position depth of finger insertion or by moving to a different resistance (color) web *