Me ke ʻano o ka rigidity kiʻekiʻe, ka ikaika kiʻekiʻe, ke kūpaʻa maikaʻi ʻana, ka anti crack a me ka anti strip, ka palekana o ke kaiapuni, Ke kūʻai maikaʻi ʻia nei kā mākou rollers ma Asia, Middle East, ʻEulopa, ʻoi aku ma mua o 30 mau kalana a lanakila i nā inoa maikaʻi mai kā mākou mea kūʻai aku.