insulator 1.Material: porcelain 2.Certificate: ISO 9001, 14000, TYPE TEST REPORT 3.Delivery time: 30-35 days 4.MOQ: a 20ft 1. Nominal creepage distance: 540mm2. Cantilever stregth: 12.5KN3. Lightning impulse withstand voltage: 150KV4. Frequency withstand wet voltage: 60KV5. Frequency withstand dry voltage: 90KV6. Color: Brown or grey7. Applicable standard: IEC 383