Mark WN3SIX issuing very nice, colourfull Award for those who do 6m.
Seriously talking it's not very easy to get six different stations with "SIX" suffix nowadays..
But if You dig deeper in your log, there's a chance You already have some from the past.
Award is free, only fee is post fee payable to Mark WN3SIX directly.
Here are the RULES with complete list of available stations.