Admiralty brass wani nau'in tagulla ne wanda ya hada da hadadden tagulla, zinc, da wasu kananan karafa irinsu tin da arsenic. An san shi don juriya mai girman lalata, kyakkyawan ductility, da launin zinare mai ban sha'awa, wanda ya sa ya zama sanannen zabi don aikace-aikacen ado da kuma yanayin ruwa. Kalmar “Admiralty” tana nufin amfani da shi wajen aikace-aikacen teku, kamar aikin ginin jirgi, saboda jurewar lalata ruwan gishiri.