The newest addition to Avery Brewing Co.’s Barrel-Aged Series is being released this week.

That beer is Old Grumbler, a 17.2 percent ABV blend of imperial ales aged between 12- and 24-months in rum barrels. The ale will be the 55th beer the Boulder, Colo.-based brewery’s Barrel-Aged Series and will be limited to 76 barrels of 12-ounce bottles and was packaged on Sept. 19.

According to a post on Avery’s website, Old Grumbler will be packaged in 12-ounce bottles that are being released at the brewery on Oct. 25, with bottles also scheduled to be sent to retailers across Avery’s distribution network after the release.

Update (Oct. 22, 2019) This post was updated to include production, release and distribution information. It was originally published on Sept. 15, 2019.