How to make a high voltage transformer 40KV

HVP-40 Universal Tester Digital Multimeter 40kV High Voltage Probe - Hot Product Promotion - News - Huazheng Electric Manufacturing (Baoding) Co.,Ltd

Why ELSCO Uses Class 220 Insulation in its Dry Type Transformers

Does anyone have experience with this type of high voltage generator? I got it from Ali Express. : r/AskElectronics

DC 6V to 40kv Step up Flyback Transformer High Voltage Module - China Flyback Transformer, Flyback Converter

High Voltage Devices

High Voltage Instrument Transformer - High Voltage Potential Transformer Distributor / Channel Partner from Vadodara

High Voltage Devices

Spellman -40kV PTV power supply - Fusor Forums

40kV High Voltage Generator 3-6V DC High Voltage Pulse Generator – Robocraze

What can I do with this generator? (DC 3.6V-6V 400KV 400000V Boost Step-up Power Module High-voltage Generator)? - Quora