We used an extension cord for smokers as well as LED lights on our patio. We ran into an issue where our GFCI kept failing in the garage. After discussing this with our electrician, he made several suggestions as to what could be causing this. It turns out he was right. The position of one of the wires allowed water to enter the connector, triggering the GFCI switch. I opted for a shorter extension cord AND a protective case. When we received it we mounted it on the deck and hooked up our Traeger smoker to it. We haven't had any problems since and it has weathered several storms. Very happy with this product PROS: Coverage, thickness, quality, almost waterproof (not quite) CONS: Not known. I only know the size. this is perhaps more than some expect.