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SG Tool Aid 21307 Replacement Bulb for 21300 Heavy Duty Circuit Tester

Manufacturer

Picture for manufacturer SG Tool Aid

Part Number

21307
8 reviews
Sale Price

$4.12

In Stock (10+)

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Usually delivered within 2 days

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The SG Tool Aid 21307 is a replacement bulb designed specifically for the Tool Aid 21300 Heavy Duty Circuit Tester. This essential replacement component ensures your circuit tester continues to function reliably when testing AC and DC wiring systems up to 36 volts.

Key Features:

  • Direct replacement bulb for Model 21300 circuit tester
  • Designed for heavy-duty applications in trucking, farm, and heavy equipment industries
  • Compatible with systems testing up to 36 volts
  • Maintains the reliability and accuracy of your circuit testing tool

Keep your heavy-duty circuit tester in working condition with this genuine SG Tool Aid replacement bulb. Essential for professionals who depend on their 21300 circuit tester for checking series-parallel switches, solenoids, and tractor-trailer starter systems.

they got Brad penn . also known as Penn Grade. they changed the name aparently. id like to see it in the old bottles as sold in the picture

Product easy to find. Shipping cost is worth convenience.

my uncle use it

Quick and easy!

Good price.

awesome

Easy

Good stuff

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