HOURGLASS12.99 GBP - 23.99 GBPBlack7354/043/800Put it in your basketAddDescriptionClear borosilicate glass hourglass with black sand.Available in several sizes.-12.5 cm high hourglass: 15 min. duration-16 cm high hourglass: 30 min. duration-18 cm high hourglass: 60 min. durationShipping, exchanges and returnsComposition: 55% sand, 45% borosilicate