I.Intangiriro y'ibicuruzwa:
Iki gicuruzwa kigizwe n'icyitegererezo cy'icyitegererezo n'ibipimo icumi bitandukanye by'icyapa cyo hagati, bikwiranye n'ubugari bwa mm (0.1 ~ 0.58) bw'icyitegererezo, ibipimo 10 byose hamwe, hamwe n'ibipimo bitandukanye byo hagati, bishobora guhinduka bitewe n'ubugari butandukanye bw'icyitegererezo. Gikoreshwa cyane mu nganda n'amashami akora impapuro, gupakira no kugenzura ubuziranenge bw'ibicuruzwa. Ni igikoresho cyihariye cyo gupima imbaraga zo gukanda impapuro n'amakarito.
u No.1 0.100-0.140 mm
u No.2 0.141-0.170 mm
u No.3 0.171-0.200 mm
u No.4 0.201-0.230 mm
u No.5 0.231-0.280 mm
u No.6 0.281-0.320 mm
u No.7 0.321-0.370 mm
u No.8 0.371-0.420 mm
u No.9 0.421-0.500 mm
u No.10 0.501-0.580 mm