... RESISTANCE(ESR) AND OSCILLATION MODE Frequency RangeE.S.R (Ω)ModeFrequency RangeE.S.R (Ω)Mode1.843MHz~1.999MHz350MaxFundamental/AT7.000MHz~9. ... list:-HC49 series (HC49U/HC49S/HC49SMD, 49SMD 4pads)-SMD crystal 4 pads (7*5mm, 6*3.5mm, 5*3 ... 5mm, 2.5*2.0mm,2.0*1.6mm)- SMD crystal 2 pads ( 8*4.5mm, 7*5mm, 6* ... , 5*3.2mm,3.2*2.5mm) -Watch crystal / cylinder crystal/ tuning fork(2*6mm,3*8mm,2*6mm frog ...