Special: Doser for the Nutrient Delivery System Connection Size: 3/4" NPT Unit Weight: 6 lbs Dimensions: 19 1/8" x 6 5/16" Flow: 0.05 to 14 GPM (0.19 to 50 LPM) Pressure: 7 to 85 PSI mL/gal: 37.5 to 375 mL tsp/gal: 7.5 to 75 tsp Percentage (%): 1 to 10% Oz/gal: 1.280 to 12.800 Included Accessories: Mounting bracket, suction hose, bypass, union, weighted strainer, and quick start guide.