ECX Differential Complete: 1:10 4wd All Made by ECX Electrix; ECX Electrix is a United States based company; parts are sourced from China producers ECX Electrix part number 232010; UPC 605482116722 This item works with: ECX 1:10 4WD Circuit Stadium, 1:10 4WD Ruckus Monster, 1:10 4WD Torment Short Course, 1:10 Circuit Stadium Truck, 1:10 Ruckus Monster Tuck