BEIJING JEFFOPTICS COMPANY LIMITED                                 B30

Address  : Room 225, Building 1,

                Jimenli Community,

                Haidian District,

                Beijing 100088 China

Tel         : 86 10 82095728

Fax        : 86 10 82095728

Email     : jeffoptics@hotmail.com

URL       : www.jeffoptics.com

Beijing Jeffoptics Co., Ltd is a company dedicated to R&D glass surface stress measurement instrument. The instruments are supplied for chemical tempered glass surface stress measurement and thermal tempered glass surface stress measurement.

JF-1 Series Surface Stress Meter is for thermal tempered glass. JF-2 Series Surface Stress Meter is for chemical tempered glass. JF-3 Series Surface Stress Meter is for thermal tempered glass.