Isinyibilikisi esingenasiphelo seglasi sihlala sisebenzisa isakhelo emva koko sifake iglasi enomsindo, okanye sibambe iglasi enomsindo ngeklip yeglasi, okanye ungalungisa iglasi enomsindo ngezikrufu.
Ingqungquthela engenasiphelo yokugcoba iglasi enobunzima: 10mm (3/8 ″), 12mm (1/2 ″) Okanye i-laminated