Special: Doser for the Nutrient Delivery System Connection Size: 3/4" NPT Unit Weight: 4 lbs Dimensions: 14" x 6 1/4" Flow: 0.05 a 11 GPM (0.19 to 42 LPM) Pressure: 4.3 to 85 PSI mL/gal: 4 to 34 mL Percentage (%): 0.1 to 0.9% Oz/gal: 0.128 to 1.280 Included Accessories: Mounting bracket, suction hose, weighted strainer, union, and quick start guide.