Stick type; Duration: 12 hours (lasts over 104°F (40°C); Maximum temperature: 144°F (63°C); Average temperature: 128°F (53°C); Chiro size: 5.1 x 3.7 inches (130 x 95 mm); Quantity: 10 pieces; Material: Iron powder, water, activated carbon, vermiculite, salt, highly absorbent resin, wood powder. Do not apply directly to skin.