Isahani yicyuma nicyapa kibase gikozwe hamwe nicyuma gishongeshejwe hanyuma ugakanda nyuma yo gukonja.
Iringaniye kandi ifite urukiramende, rushobora kuzunguruka cyangwa gukata umurongo mugari w'ibyuma.
Isahani yicyuma igabanijwe ukurikije ubunini.Ibyuma bito bito biri munsi ya 4mm (inanutse cyane ni 0.2mm), icyuma giciriritse cyibyuma ni 4 ~ 60mm, naho ibyuma byibyimbye byiyongereye ni 60 ~ 115mm.
Isahani yicyuma igabanijwemo kuzunguruka no gukonjesha ukurikije kuzunguruka.
Ubugari bw'urupapuro ni 500 ~ 1500 mm;Ubugari bwubugari ni 600 ~ 3000 mm.Isahani ntoya igabanijwemo ibyuma bisanzwe, ibyuma byujuje ubuziranenge, ibyuma bivanze, ibyuma byamasoko, ibyuma bitagira umwanda, ibyuma byuma, ibyuma birwanya ubushyuhe, bitwaje ibyuma, ibyuma bya silikoni hamwe n’ibyuma byoroheje byoroheje;Ukurikije ubuhanga bw'umwuga, hari isahani ya peteroli, isahani ya emam, isahani itagira amasasu, nibindi;Ukurikije igifuniko cyo hejuru, hari urupapuro rwometseho, urupapuro rwometseho amabati, urupapuro rwometseho isahani, icyuma cya plastiki gikomatanya, nibindi.