M karfe piped an yi shi ne da bututun ƙarfe ko narkewa, takardu, bayanan martaba, kuma suna da siffar da zai ba su damar aiki (canza shugabanci ko farashin ruwa) a cikin pipping tsarin. Wadannan kayan haɗi galibi sun haɗa da ƙarfe na ƙarfe (45 ko 90 digiri na bends), ƙuƙwalwa, tsayayyen ƙasa), coventrics, caps, fulawa, da sauransu