HotHands H163760 Hand Warmer, Air Activated, Up to 10 hr, 15 min to 30 min, 3 1 2 in Lg, 40 PK 98381A634 Equipping Your Employees with the Equipping Your Employees with the Proper Lockout Tools and Warning Devices Can Save Lives UL252 Supply Pressure Gauge 3 These hand warmers are worn inside gloves and mittens and give off heat that keep hands and fingers warm Warmer Type Hand Warmer Activation Method Air Activated Heating Time Up to 10 hr Average Temperature 135 °F Number of Hand Warmers Included 40 Length 3 1 2 in Width 2 in Reusability Disposable For Use With Gloves Time to Reach Average Temperature 15 min to 30 min Country of Origin USA