Slow release watering bag for trees * Ideal for newly planted shade or street trees with trunks up to 4-inches in diameter * Saves trees deep water saturation helps reduce transplant shock and drought stress * Eliminates water waste due to run-off and evaporation; install and fill in just minutes - requires re-filling just once ever 5 to 7 days * 5-Year limited manufacturer warranty against defects in materials and workmanship