Powerweb 14in Combo Hand Exerciser Red Blue Otoscope Sets * 24 rear urethane wheels 17170 * 24 rear urethane wheels with durable hand rims * Useful in the diagnosis of head lice and the treatment of fungus infections and injuries to the skin and eyes * Lightweight cordless design make this lamp easy to use and store * One 4W black light flourescent tube * Requires 4 AA batteries (not included) 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 *