63mm 4layer Ibyuma bidafite ibyuma bisya ibyuma bifite ubuziranenge bukomeye, amenyo meza atyaye atema ibintu byose, igishushanyo gishya cyo kureba kugirango igihe cyo gusya kitanyerera, imbaraga za magnetique, umubyimba mwinshi reka wumve ufite umutekano.Usibye gutanga isura nziza, gutwikira isahani nayo ntabwo ari inkoni kandi byoroshye kuyisukura.