Umurongo wa 20-30 na Cutter wateguwe kuri 20-30 awg (0.81-0.25 mm) insinga.
Ibindi bintu birimo gufungura isoko kugirango ugabanye umunaniro, wire ugenda, uhigana umwobo uherereye, umukara oxide urangirira, hamwe nubutaka bworoshye.