**GMC Electrical, Inc. will be closed from 12/19/2025 (mid-day) through 1/02/2026 for the Holidays. 
Normal business hours will resume of Monday January 5th, 2026. Have a Happy Holiday Season!

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    • Copper-Copper Sulphate

    • Copper Copper Sulfate CU-6-TH
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      Copper Copper Sulfate CU-6-TH

      The GMC STAPERM™ thru-hull mounting assembly is designed to provide easy installation of special submersible STAPERM™ reference electrodes. Each electrode comes complete with a test lead junction box, electrode sealing system and 3/4" NPT...

      $734.00
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    • STAPERM™ Model CU-1-UG
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      STAPERM™ Model CU-1-UG

      Size: 2" dia. x 7" long high impact ABS plastic tube. Packaging: Special non-polarizing backfilled in yellow cotton bag. Overall size: Approx. 6" dia. x 14" long. Weight: Approx. 15 lbs. Special sizes: Upon request...

      $144.00
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    • STAPERM™ Model CU-1-UGPC
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      STAPERM™ Model CU-1-UGPC

      The STAPERM™ Model CU-1-UGPC is a powerful and reliable space-age ceramic tube that is designed to offer impressive performance that can meet the requirements of a range of industries. The product measures 1.5 inches in diameter and has a length of...

      $130.00
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