3c-test 7637-4R500/120 Load Resistor Isolation Capacitor Shielded Enclosure is available through DeltaFaraday for EMC, RF, and compliance test equipment sourcing. Model: 3c-test 7637-4R500/120 Load Resistor. Contact DeltaFaraday for current availability, pricing, calibration options, rentals, and equivalent configuration support.