Zonke izinto ezikwishishini zinembali ende, kodwa namhlanje sithetha ngokuphuhliswa kwembali yeI-alloy yentsimbi.
Ukususela kwiMfazwe yesibini yeHlabathi ukuya kwi-1960s,I-alloy yentsimbiubukhulu becala ixesha lokuphuhliswa kwentsimbi enamandla kunye ne-ultra-ende-ephezulu. Ngenxa yeemfuno zomzi-mveliso wokuhamba ngenqwelomoya kunye nophuhliso lwetekhnoloji yeRocket, amandla amaninzi amatsha aphezulu kunye namandla aphezulu e-Altra oPhezulu. I-alloy yensimbi yaqala ukukhula kwicala lokucoceka kakhulu, ukuchaneka okuphezulu kunye ne-Ultra-ephantsi. I-marating yensimbi kunye ne-ultra-firrite ivele yavela kwakhona.Neika zensimbi njengentsimbi engenasiseko.