Ubu ni 4inch yuburebure bwikirahure hasi cyane cyane mubara ryamabara.Hano hari ikirahuri kimwe gito munsi yikibaho kimeze nkumuyoboro wikirahure.Ifite ibice bitatu, nibyiza rwose kuyungurura ibirahuri bong nibindi bice byihishe mwumwotsi.Sisitemu zimwe na zimwe zitanga uburyo bwibanze bwo gucengeza byongera uburambe mukwemerera umwuka wo gukwirakwiza umwotsi neza.Ibi bifatanije nigishushanyo mbonera, gitanga ubuso bunini bwumwotsi kugirango ushungure mumazi yose .Ushobora kujyana hanze, uyakoresha mugihe cyurugendo, cyangwa ukishimira ibihe byiza byamazu murugo.