Special: Doser for the Nutrient Delivery System Connection Size: 3/4" NPT Unit Weight: 6 lbs Dimensions: 21" x 6 5/16" Flow: 0.05 to 14 GPM (0.19 to 50 LPM) Pressure: 4.3 to 85 PSI mL/gal: 1.25 to 11 mL Percentage (%): 0.03 to 0.3% Oz/gal: 0.0425 to 0.384 Included Accessories: Mounting bracket, suction hose, bypass, union, weighted strainer, and quick start guide.