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: 4.3 to 85 PSI Ratio: 1:500 to 1:50 mL/gal: 7.5 to 75 mL Tsp/gal: 1.5 to 15 Percentage (%): 0.2 to 2% Oz/gal: 0.256 to 2.560 Included Accessories: Mounting bracket, suction hose, weighted strainer, bypass, union, and quick start guide.