INKO Slim Heater Set of 2 (Gray, Rosewood) Thickness: 1.5mm, Weight: 92g, convenient for carrying. Online price: Approximately 4500 yen per piece I am selling these because I didn't use them after purchasing. Ideal for cold workplaces, desks, meetings, etc., as a way to save on heating. Stored at home, so there may be some scratches on the box. Please refrain from purchasing if you are concerned about this.