YOUNG STAR ®(IND@7) Premium Quality Doctors Choice Prefilled Gel Base Electric Hot Pad/Bag for 5 Hours Thermal Heatin Effect After One Charge.Portable Hot Bag/pad.Gel Base Electric Hot Warm Bag/Pad for Pain Relief Heating Pad Electric 1.5 L Hot Gel Bag. PREFILLED GEL ELECTRIC HOT GEL BASE BAG 1.5 L