1. No matter what happens to the flow rate and flow rate, the dosage of the solution is always strictly proportional to the amount of water entering the equipment. 2. This proportional pump is made of high-quality PVC material, which is , - and wear-. 3. The proportional device is installed in the water supply pipeline, and the power can be obtained without the electric driving water pressure. 4. The water pressure loss is small, and the precise proportion setting is not affected by the water flow. 5. This product is suitable for wastewater irrigation, equipment maintenance, horticultural flowers, livestock breeding, environmental protection and water treatment, industrial hygiene, vehicle cleaning, food processing, printing industry or other industries that need to be diluted. Continuous Work: 100 Days Working Water Pressure:0.2-6bar Water Flow Temperature:1-45℃(33.8℉-113℉) Pipeline Pressure:0.2-8 Pa (2.9-113.4 ) (Water pressure loss can get 0.1 Pa at low flow and 1 Pa at high flow) Water Loss:0.2 Pa-1.2 Pa Inlet and Outlet Thread:G3/4in Length:.47cm/18.5in Proportion Range:0.2%-2% (1:50-1:500) Flow Range:12L/H-3000L/H Inlet And Outlet Diameter:32mm/25mm Note:Due to different production batches, the product appearance , but it does not affect the use. Colour:Blue Material:Plastic Package Contents: 1 * Fertilizers Injector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 340 hours.