Parabath. Paraffin Heat Therapy provides soothing moist heat to warm joints, tissue and skin. The Parabath. Unit is ideal for the treatment of patients suffering from pain associated with arthritis, strains, sprains, joint stiffness, and it is also used to increase range of motion. Comes with a 5-year limited warranty.The deep oversized tank allows easy immersion of hand and wrist, foot and ankle, or elbow. Made of stainless steel, the tank features an insulated outer housing to help retain heat. Choose citrus-scented paraffin or original unscented paraffin refills.