Very Low Frequency AC Hipot Tester WUHAN PRIMARY TESTER TECH&SCIENCE CO., LTD. Base Info Model NO.:VLF-30Trademark:HuayingTransport Package:Wooden CaseOrigin:China (Mainland)HS Code:9030390000 Description Pre:Very Low Frequency Cable Tester Vlf Cable Tester Next:50kv 10mA DC High Voltage Generator