The Power Web Hand Exerciser is a natural rubber web used to strengthen and condition the muscles and joints of the fingers, wrist, and forearm. The web is connected to a steel ring. Ring diameters are 7″(junior) and 14″(standard). Resistance levels are Tan (ultralight), Yellow (light), Red (medium), Green (heavy), Blue (super heavy), and Black (ultra-heavy). An exercise manual is included.