Fashewar Shenhai-Hujja
Matakan kariya sun haɗa da lambar IP da lambobi biyu ke bi. Lambar farko a hagu tana nuna matakin hana ƙura, yayin da lamba ta biyu ke wakiltar matakin hana ruwa.
Wani lokaci, masu saye, neman ƙananan farashi ko rashin fahimtar matakan kariya, zai iya zaɓar injunan tabbatar da fashewa tare da ƙananan ƙimar IP fiye da yadda ake buƙata. Misali, lokacin zabar wani motar da ke hana fashewa don aikace-aikace kamar tuƙi injin niƙa a cikin injin wuta, Yana da mahimmanci a yi amfani da ɗaya tare da ƙimar IP54, maimakon daidaitawa don IP44 ko ma injinan IP23.