This is a big 50-50 Calking. He's just over 4 ft and will eat 2 md rats at a whack. 3 smalls are no problem. He's VERY tame except when he's hungry.
This is a Coastal Calking. Naturally both he and the Desert King above are blue but you can see the differences and size.
I've had one Calking that was almost 6 feet long, she was a whopper and I've had a few that were with in a couple inches of 5 ft.
The Coastal is about 2 ft and he'll easily eat 2 mice sometimes 3 or 4 depending on size.
I generally feed every 7 to 10 days occasionally going a couple of weeks between feedings.