Hand Warmer. Ideal for outdoor workers and those who engage in cold weather sporting activities. Effective for arthritic or muscle/joint pain. Soft, lightweight and easy to activate. Maintains temperatures of up to 65° Celsius (150° Fahrenheit) for up to 12 hours. Easily fits in pocket, purse, knapsack or glove compartment. Dimensions: 6.4 x 10.2 cm (2-1/2" x 4"). Sold as Each