I know this is an old thread but seemed to fit. i've seen here & numerous other places that the Comply 400 was the size for the Monster Turbines, but now i look it up on their site and it says that 200 is the correct size? Confused..... Did Comply change their sizing or did Monster change something in the more recent production of the Monster Turbines? I got mine shortly after they were initially released (...couple years ago?) I really like Comply, just want to make sure i get the right ones... any help would be greatly appreciated.