Great Quality ANSI-Rated GPT Z78 Safety Glasses Gray/Beige Translucent Plastic Frames Retro Look Retro Safety Glasses These barely tinted safety glasses with gray/beige translucent plastic frames are ANSI-rated GPT Z78. The frames have guards on the temples and measure 5-1/4" across. Bonus: there's simply nothing as hot at the moment among the fashionista safety glass crowd as this 1970s-aviator style. They're flying off the shelves at our machinists' supply center in Milano.