ONE Dynaco A-25 speaker high frequency TWEETER DRIVER as pictured . It's in good sounding condition (tested) . Impedance = 4-8 Ohms ( DCR = 5.2 Ohms ) . Mounting hole to hole = 3 3/4" ( flange = 4" diameter) . Part # 87-H . Note : This selling is final ( no return or refund ) Please buy or bid accordingly. Thanks for looking.