1、Dry dial,Vacuum sealed to keep clean reading for long time. 2、360°Rotating dial. 3、Magnetic transmission. 4、Not affected by magnetic field . 5、Tamper proof 6、Material : Brass body/Non-ferrous metal. 7、Pressure:16 Bar. 8、Size :15mm,20mm, 25mm, 32mm, 40mm 9、Non-return valve is available 10、Un-affected by grit and particulates 11、Provided with wire and lead seal 12、Available for cold water 0~50℃ 13、Ambient temperature:55℃ 14、Confirm to ISO4064/OMIL R49 15、Installation direction: Any 16、Accuracy : class II 17、Flow rate: Q3/Q1=160 18、The technical parameters apply on all diameters of this model. From 15mm to 25mm