Orange Reusable Hand Warmer - Set of Two. Simply snap the metal disk inside to heat up these handwarmers. To reuse, just boil in water for 10 to 15 minutes. Includes two hand warmers5.25'' W x 0.5'' H x 3.25'' D eachMetal / gelHeats up to 130o FGenerates heat for 60 minutesHand washImported.