Southwire 50 ft. 10/3 SJTW Tri-Source (Multi-Outlet) Outdoor Heavy-Duty Extension Cord 4388SW8802 - The Home Depot
10/3 Contractor Grade 50 ft 10 Gauge Power Extension Cord 10/3 Plug, 50 ft Outdoor Extension Cord, Great for Commercial Use, Gardening, and Major Appliances Cord with Lighted Ends (50 ft,red) - Amazon.com
Amazon.com: 10 3 Contractor Grade 50 ft 10 Gauge Power Extension Cord 10/3 50 ft Extension Cord 50 ft with Lighted Ends Black Extension Cord 10/3 Plug (50 ft 10 Gauge, Black