I'll guess .0045"-.005", but I have never used them, so take with a grain of salt.
I'm very surprised Mahle doesn't have specs for them posted somewhere...
I bet if you called or emailed customer service and posted the question (with the Mahle part#) you would have what you seek in a day or less.
Addendum to Newtons first law:
zero vehicles on jackstands, square gets a fresh 090 and 1911, cabby gets a blower.
EZ3.6 Vanagon after that.(mounted, needs everything finished) then Creamsicle.