Specifications: Rated power: 5W, no need to divide the positive and negative poles Working mode: quota system (that is, intermittent cycle work system, the longest continuous work for about 4 hours, can continue to work after stopping for ten minutes, there will be danger of burning coils for more than four hours) Use fluid: (0-100 ° C) water Flow characteristics of water: 0.02Mpa>1.5L/min; 0.10Mpa>7L/min; 0.30Mpa>12L/min; 0.80Mpa>20L/min Insulation performance: The insulation resistance between the conductor and the non-conductor is greater than 100M? Insulation class: Class E insulation Service life: ?500,000 times (laboratory data), ?300,000 times (actual normal use) Valve type: diaphragm (operated by Servo) Usage: water and low viscosity fluids Material: metal + plastic External thread diameter: approx. 20mm Screw hole pitch:25mm Size: approx. 84 x 57mm (L x H) Coil size: approx. 34 x 23mm (W x H) Unit conversion: 1mm=0.039inch Note: Manual measurement, with small error. Please check size in detail before purchase. Real colors may slightly differ from the pictures, as it depends on specific monitor settings and light brightness. We highly appreciate all customers opinions to improve the selling, also if anything you unsatisfied, please contact us for probable best solution. Package Includes: 2Pcs