1. UL CERTIFICATE HEAVY DUTY GENERECTOR EXTENSION CORD Cords. 30A Generator Extension L14-30P 2. TWIST LOCKING DESIGN The plugs was design with the lock structure.When the plug is inserted and twisted to lock place,it will not slipping from the generator socket due to wind, hurricane,big rain, snow, This is the best extension cord for your generator to connect with home appliance and electric power tools. 3. WEATHER/WATER/FIRE RESISTANCE The good quality of the SJTW cable 105℃ with the FT-1 level fire resistance.The cable can be used indoor/outdoor for all weather and season,it is also with the water resistance,much safer for emergency and extreme weather using 4. HEAVY DUTY The big gague and pure copper can avoid the cable getting overheating from long -time use.It is a useful and reliable emergency extension cord for your generator. 5. YEAR QUALITY GUARANTEE AND 1 YEAR CUSTOMER SERVICE If you found any problem of our cable pls email us,we will feedback you in 24 hours.