Aider AD TR79M, Heavy Duty ESE Lightning Protection Air Terminal with Advanced Rolling Spear Head & Side Flash Protection Technology [SFPT] is independently Tested & Complete with the lightning terminal configured as a spheroid. The ESE Lightning Protector comprises of electrically isolated He-30 [He30 (6082) is a medium strength alloy with excellent corrosion resistance. It has the highest strength of the 6000 series alloys.]  Alloy panel surrounding by and finally earthed central terminal with multiple induction connecters. The insulation material used to electrically isolate the panel (alloy) is comprised of ‘oa’ base polymer which provides high ozone & uv resistance with a die-electric strength of 24-38 uv/mm tested AD T79M ESE Air Terminal Is compliance with NFC 17- 102, and tested with the “Switching Impulse Voltage & direct voltage of 100 kv. Protection area from direct lightning is Level 1 to Level 4 is 79 meter to 107 meter radius