Delta Lightning Arrestor Surge Arrestor, 600 Series, Industrial, 240 - 480 - 600 V, 50/60 HZ, Phase: 3 PH, Short Circuit Rating: 100000 AMP, Response Time: 5 NS At 1 MILAMP, 10 NS At 10000 AMP, 25 NS At 50000 AMP, Material: PVC Case, 2-1/4 IN Diameter X 4-1/2 IN Height, Leads: 36 IN 12 THHN, Clampin