Ụgbọ okporo ígwè na-enweghị elu na-ejikarị freemu wee fanye iko dị ọkụ, ma ọ bụ jiri skru machie iko a na-ewe iwe ọkụ, ma ọ bụ ị nwere ike iji kposara dozie iko ahụ dị ọkụ.Igwe anaghị agba nchara na-enweghị oke: 10mm (3/8 ″), 12mm (1/2 ″) ma ọ bụ laminated.
Igwe ọkụ aluminom na-ekpo ọkụ bụ 5mm (1/5 inch), 6mm (1/4 inch)Agba: Glass doro anya, Glass Bronze, Glass Grey, Glass pinhead, Glass EtchedỤkpụrụ nyocha: ANSI Z97.1,16 CFR1201, Can CGSB 12.1-M90, CE-EN12150