RK2681N: 100 kΩ-5 TΩ 10/25/50/100 / 250 / 500 V
RK2681AN: 100kΩ-10TΩ 10/50/100/250/500 /1000V
RK2682N: 500kΩ-2GΩ 500/1000V
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