4/3 NM-B Wire Copper Non-Metallic Sheathed Cable 600V Black (20FT): Amazon.com: Tools & Home Improvement
4-3 Romex® Brand SIMpull® Type NM-B Cable - Cable Cabana
How to Install 3 and 4 Wire 240 Volt Dryer Cords - Fred's Appliance Academy
AC WORKS 1.5ft NEMA 10-30P to NEMA 14-30R 30-Amp 3-wire To 4-wire Grounding Single To Single Black Basic Flexible Adapter in the Adapters & Splitters department at Lowes.com
How To Convert 3 Wire Dryer Electrical Outlet to 4 Wire - YouTube
Southwire 500 ft. 4/3 Stranded Romex SIMpull CU NM-B W/G Wire 63968205 - The Home Depot