Soil SeparatorNatures Footprint Soil Separator allows you to convert any garden pot into a self watering container. Simply place the separator in your pot and add a saucer to create a water reservoir with wicking chambers. Your pot can now manage its own water needs! Simply keep your saucer full of water, and the soil will draw the water up using a wicking action. Separators measures 14. 75" & 17. 5" in diameter. Available in black.