Provides water or fertilizer directly to the roots for healthy growth. Prompts trees to grow roots deeper and further from trunk for longevity. Eliminates water runoff and evaporation. Detachable, universal, 3" shut off brass valve makes it easy to contro l water flow. Depth markers of 12", 18" and 24" for precise watering of tree roots. This item cannot be shipped to APO/FPO addresses. Please accept our apologies