HOURGLASS10.99 GBP - 29.99 GBPSand7352/043/711Put it in your basketAddDescriptionGlass hourglass. Available in several sizes. The duration of each one is: - Small 5 min- Medium 10 min- Large 1h- XXL 2hShipping, exchanges and returnsComposition: 90% borosilicate, 10% sand