General description Portable Fuel Hand Warmers are designed for outdoor activities such as hunting and fishing. They are reusable and provide a high heat output, making them effective even in extremely cold temperatures as low as -40°C. Their economical fuel consumption ensures long-lasting use, providing many years of service. Technical specifications Color: Silver Material: Metal Size: 10.5 x 7 x 2.2 cm Package Contents: 2 x Hand Warmers, 2 x Bags Measurement allowed error: +/- 1-3 cm