All I know is I threw a rat in don't know what size but it was slightly a bit thicker than the girthiest part of his body... He came out as soon as I threw it in his enclosure,slithered over within 2 mins if even that long struck and chocked the crap out of this thing..swallowed him no problem..best thing is,this is how cool and sweet he is..as soon as he was done eating I saw some aspen stuck in his teeth,opened up the cage picked him right up and removed the aspen with the tongs and placed him right back into his hide..I didn't get a single hiss or strike out of him,he really is a sweetheart..