This wooden cover fits snugly on top of the Blue or Yellow Cascade sand & water tray. As well as keeping the sand clean & cat free, with the cover in place the TP Cascade tray can be used for other creative activity including painting & drawing. Please note: Only compatible with the TP Cascade sand & water trays. Please note: This purchase is for the Cascade Lid only. We recommend storing the item indoors; the lid is not suitable for use in wet weather.2 years+