... weld completely sealed type n The tight frequency stabilityn Copes with high density mounting and is the optimum for mass production ... series (HC49U/HC49S/HC49SMD, 49SMD 4pads)-SMD crystal 4 pads (7*5mm, 6*3.5mm, 5*3.2mm, 4*2.5mm, 3.2*2.5mm, 2.5*2 ... .0mm,2.0*1.6mm)- SMD crystal 2 pads ( 8*4.5mm, 7*5mm, 6 ...