Prime Marine Adapter, 30-Amp Twist-To-Lock Plug and 15-Amp Connector, Yellow: * Enables a 15-Amp cord to be plugged into a standard 30-Amp dockside power source * Features heavy-duty marine-grade Twist-to-Lock plug and connector with water-proof seal * Cord is flexible in temperatures from -40 degrees Fahrenheit up to 140 degrees Fahrenheit * Heavy-duty, super abrasion resistant, flame retardant and water resistant cable * Over-sized strain reliefs prevent the plug and connector from separating from the wire