T18N12 T18PB1-12.000MHZ-T T18PB1-16.000MHZ-T T18PB1-18.432MHZ-T T18PB1-24.000MHZ-T T18PB1-24.576MHZ-T T18PB1-25.000MHZ-T T18PB1-27.000MHZ-T T18PB1-28.63636MHZ-T T18PB1-30.000MHZ-T