This Dramm 170 Aluminum Water Breaker Nozzle is great for places with systems that restrict total water volume or that have low water pressure. It is a professional grade water breaker. Dramm 170 Aluminum Water Breaker Nozzle is made for watering with fertilizer or for small containers such as hanging baskets. This enables you to change to 50% water flow of the total volume. It is made cast aluminum that has 3/4 brass hose threads. Manufactured in the USA.