This is a high quality aftermarketBEYMA CP800 TI / CP850 TI-ND diaphragm. FEATURES A INCREDIBLE CLARITY & DEFINITION W/ VERY LOW DISTORTION HANDLES EXTREME HIGH POWER OVER EXTENDED PERIODS OF TIME FOR ALL HIGH POWER HIGH FREQUENCY APPLICATIONS INCLUDING CONCERT, ARENA, THEATRES, DANCE CLUBS, SOUND REINFORCEMENT, ETC.