clocksdomed and flat clock glassesthickness 1.70-1.90mm Subgroups Mineral glasses domed for alarms and clocks. nameVersiondimensionsadditionitem No.MMGMineral - domed50-80mmonly in straight sizes069050MMGMineral - domed82-120mmonly in straight sizes069082MMGMineral - domed122-160mmonly in straight sizes069122MMGMineral - domed162-200mmonly in straight sizes069162MMGMineral - domed205-250mmonly in sizes of 5069210MMGMineral - domed255-300mmonly in sizes of 5069255MMGMineral - domed305-330mmonly in sizes of 5069305 Plastic glasses domed for alarms and clocks. nameVersiondimensionsadditionitem No.MPPlastic - domed50-80mmavailable in all sizes067050MPPlastic - domed81-120mmavailable in all sizes067081 Mineral glasses flat for alarms and clocks. nameVersiondimensionsadditionitem No.MFGMineral - flat50-250mmonly in straight sizes068050