Surge Arrestor, Entire Electrical Service;For Added Protection to Computers;Heating/Air Conditioning Equipment;Maclean Power Systems Recommends;Major Appliances;Protect Wiring;Pumps Application, #14 Awg Compatible Wire Size, Ring Terminal Connection Type, 48 HZ;62 HZ Frequency Rating, 3.335 In Height, Metal Oxide Material, Bracket Mount Mounting Type, 3 - Poles, 3 - Wires, 250 PK;50 CT Package Quantity, The Arresters Are Designed For Repeated Operation and Continuous Protection Special Features, Ansi/Ieee