The Valterra A10-1530BK Adapter Plug is a dogbone-style cord that adapts 15-amp power for use with 30-amp male RV plugs. 12" long pigtail adapter is made of heavy-duty thermoplastic for outdoor use.• Adapts 15-amp female for use with 30-amp male RV plug• 12" long dogbone-style• Made with thick 10-gauge and 3-wire lighting standard• Easy to use adapter cord• Universal fit for RVs Made of heavy-duty thermoplastic for outdoor use Universal fit for RVs | A10-1530BK 15A Male to 30A Female Dogbone Adapter