Ko te mowhiti me te tinana hurihuri o te kawe karamu he mea hanga mai i nga rawa-ceramic katoa, tae atu ki te zirconia (ZrO2), te nitride silicon (Si3N4) me te carbide silicon (Sic). Ko te kaipupuri he mea hanga mai i te polytetrafluoroethylene, nylon 66, polyetherimide, zirconia, silicon nitride, he kowiri tira, he konumohe rererangi motuhake ranei, na reira ka whakawhānui ake i te mata tono o nga papa raima.