Ƙasar misali rufi ko ƙarshen rufi raba zuwa convex rufi, conical rufi (kawai amfani da kwantena don wasu amfani na musamman) da kuma farantin rufi (ban da amfani a matsayin rufi na ramin mutum da ramin hannu a cikin matsin lamba kwantena).
Ƙasar misali rufi ne wani ɓangare na kwantena (kamar hoton da ke sama) dangane da bambancin geometry, za a iya raba shi zuwa nau'ikan ƙwanƙwasa, oval, farantin, ƙwanƙwasa, ƙwanƙwasa da rufi da sauransu, daga cikinsu ƙwanƙwasa, oval, farantin, ƙwanƙwasa da aka sani da ƙwanƙwasa. A walda aka raba zuwa juya-juya walda rufi kai, bearing walda rufi kai. Ana amfani da kayan aikin kwantena daban-daban kamar tankuna, masu musayar zafi, hasumiyoyi, reactors, boilers da na'urorin rabuwa da sauransu. Kayan sun kasance carbon karfe (A3, 20 #, Q235), bakin karfe, karfe, aluminum, titanium, jan ƙarfe, nickel da nickel gami da sauransu.