| Brand | Unbranded |
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Check the listing for details. ZX21a Precision Plastic Variable Decade Resistance Resistor Box Physical Electr. Condition: New. Listed at 155.00 USD. 1 x Set of ZX21a DC Resistance Box. ZX21 series rotary resistance box is suitable for ambient air temperature + 10 ℃ ~ + 35 ℃ and relative humidity when using 30 to 80%. Dielectric strength of the resistance box circuit between the shell, withstand a frequency of 50 Hz, 2000 VAC's role, which lasted one minute.