Turn your 50-amp NEMA 14-50P plug into an RV-Ready TT-30R outlet Heavy-Duty Construction: Flame retardant and heat-resistant PVC material, which makes the whole adapter cord sturdy, pressure-proof and durable. Temperature Range: -40°F to +140°F WHY NEED THIS: In case a spot only has a 50amp outlet. Compared to the dogbone, it can be completely hidden in the RV power box without worrying about getting caught in the rain. We can guarantee 12 months money back and quality warranty. If you have any problem of using the product, please contact us & you will get timely and friendly customer service.