The 50 amp male to 30 amp female pter is i for connecting your camper into a regular outlet.  Constructed from solid brass contacts and strong PVC that is built to stand up to the toughest conditions; pter is designed with grooves to hold tightly for a non-slip g.  These are for use in campgrounds, motor parks and recreational areas. 
  Item: DPT30F50M
 Durable PVC Material
 Blue Convenience: This RV power pter is convenient for camping or RV around the country
 It has extra durability but will still stay flexible in hot and cold conditions. 
 This cord can be used in almost any type of weather
 Suitable for replacing the old/worn out receptacle and cord, perfect for RV, Camper, Caravan, Motorhome etc
 Features: Durable
  Manufacturer Part Number: DPT30F50M
 Assembled Product Dimensions (L x W x H): 15. 20 x 5. 50 x 7. 60 Centimeters