a 'casing' for a shotgun shell
a sausage 'casing'
(..) First part's done. What now? We gotta unwrap the secondary explosives... the dynamite, the RPGs. Make sure these casings are not messed up, and do not mess them up, either. This thing could still blow. You all heard her. Let's go. You can load the (..)2017 TvShow: The Walking Dead Title: Rock in the Road Season: 7 Episode 9