Cycle Brewing is commemorating its fourth anniversary by releasing four brand new beers, including a collaboration with a well known brewery in Sweden.

The first release is Rare DOS 1, an imperial stout aged in whiskey barrels for “over one year.” Packaged in 22-ounce bottles, the stout will be available for $25 per bottle.

Next up is Hazelnut, an imperial stout brewed with hazelnuts and cocoa nibs before being aged in barrels. The new stout will be packaged in 22-ounce bottles and priced at $30 each.

The third release is Rare Noa, an imperial stout brewed with coffee, cinnamon and pecans and aged in bourbon barrels. The stout is a collaboration with Swedish brewery Omnipollo and will be available packaged in 22-ounce bottles for $30 each.

Finally, there will be Rare DOS Double Barrel, an imperial stout aged in bourbon barrels before being moved to cinnamon vanilla whiskey barrels.  The new stout will be priced at $35 and packaged in 22-ounce bottles.

According to a post on Cycle’s Facebook page, all four new beers will be released starting on Aug. 15. Bottle limits on the remaining three bottles will be announced on the day of release.