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How long do they last?
On a related note, I have been using a TRC Surge Guard, Model 34750 (50A) portable power protection unit for about 11 years now. I'm wondering how long these last? It still seems to operate properly and I guess if it "went bad" it probably wouldn't...right? 
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2021 Cougar 290RLS Fifth Wheel
2021 Ford F250 Super Duty, 4X4, 6.7L Turbo Diesel, Short Bed with Pullrite Superglide hitch
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