Alumina hollow kwan fitila tubali/ Alumina kumfa tubali ne mai haske alumina samfurin da aka yi da masana'antu alumina ta hanyar narkewa-busa.Ana iya amfani da bulogin rufe fuska mai nauyi da aka yi daga kwan fitila azaman rufi a cikin tanderun zafin jiki a cikin hulɗa kai tsaye da harshen wuta.
Mutura farantikumacruciblessuna da fa'idodin babban abun ciki na alumina, ƙarancin ƙazanta, juriya mai zafi, kwanciyar hankali mai kyau da ƙarancin haɓaka haɓaka.