Xeroform™ Occlusive Xeroform Petrolatum Impregnated Dressing, 4 Inch x 3 Yard, 1 Box of 6 Dry Heat Therapy Units Parts 6 lb * One piece 413116 6 lb * One piece internal casting cast iron with Size Specific Ergonomic Handles and heavy duty color cover * Weights sold individually 100 FOOT CLINICAL ROLLS * X Heavy Black * Available in seven levels of resistance * Made of natural rubber * Thera band colors increasing in difficulty through seven levels from tan to silver * The color coding system provides positive reinforcement and feedback for gauging results * Nonadhesive 3% bismuth tribromophenate in a special petrolatum blend on fine mesh gauze