18mm robe septa yawanci yana nufin nau'in ƙulli da aka yi amfani da shi a cikin ɗakunan ajiya. Septa na roba ana yin su sau da yawa daga kayan silicone ko roba roba kuma an tsara su don rufe kwantena kamar vials ko kwalabe. Ana amfani dasu a aikace-aikace a aikace-aikacen da ake buƙatar adana samfuran samfurin da aka sarrafa. Ana amfani dasu da yawa a cikin dakunan gwaje-gwaje don aikace-aikacen kwamfuta, ruwa chromatography, samfurin campomatography, ko wasu fasahar bincike.
