1.5MHz,6MHz sensor crystal 2.Gold,Silver,Alloy type 3.Professional manufacturer 4.ISO9001,SGS 5.Long life ... focuses on 5MHz & 6MHz quartz crystal blanks with three kinds of electrode including gold,silver and alloy. Our products can be tailored ... Quartz crystal microbalance from China ,hold 5&6Mhz Quartz crystals, available in gold , silver and alloy electrode ,excellent for thin film thickness ...