MY WHOLE HOUSE GENERATOR - DuroMax 12,000 Max 9,500 Running Watts Dual Fuel

I was mistaken and it was a 40 AMP Breaker installed and it has since been upgraded to a 60 amp Breaker which is the correct size for the application.

DuroMax 12,000 Max 9,500 Running Watts Dual Fuel Electric Start Portable Generator, XP12000EH -
https://amzn.to/3bbplRK

POWER CORD-
https://amzn.to/2QABLsY

Male end adaptor of power cord-
https://amzn.to/2YPEpiZ