Akwai nau'ikan kawuna guda biyu waɗanda ke kawo "maganin kai 1" zuwa maɗaukaki mafi girma wanda zai iya ɗaukar nau'ikan abubuwa masu yawa yayin kiyaye babban gudu ba tare da maye gurbin kai ba.Ana iya amfani da kawuna na gabaɗaya mai saurin gudu don ƙananan ƙananan (0201mm).