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Description
JFIND JF109 Car Double Hole Spark Plug Tester, JF109 (US Plug), JF109 (EU Plug)Feature: 1. It has two testing holes, you can test two spark plugs meanwhile and and if you suspect any spark plug works improperly you could compare and test to make accurate judgment. 2. Adjustable double hole car spark plug tester detector ignition plug analyzer diagnostic tool. 3. Usage: test spark plug performance and ignition strength 4. Application range: 12V Gasoline vehicles car spark plugs 5. Widely application: 100V 240V input voltage . 6.
Feature:1. It has two testing holes, you can test two spark plugs meanwhile and and if you suspect any spark plug works improperly you could compare and test to make accurate judgment.
2. Adjustable double hole car spark plug tester detector ignition plug analyzer diagnostic tool.
3. Usage: test spark plug performance and ignition strength
4. Application range: 12V Gasoline vehicles car spark plugs
5. Widely application: 100V-240V input voltage .
6. Test principle: In automobile ignition system, the high-voltage ignition coil generates a high-voltage (10000 volts or more), and the spark plug diverts it form high -tension ignition coil into the cylinder engine, spark between the spark plug electrodes will ignite the mixture. The JF109 could tell the good spark plugs from the bad by the strength of the spark.
Using Note:
1. Please Turn Off Power before you place spark plug
2. The Spark Plug Tester is a high-voltage detector, so do not touch spark plug with hand at work to avoid danger.
User Manual:
1. Place the Spark Plug into tester hole 1 or 2; If you want to compare the new spark plug and old one, place new spark plug into hole 1 and the old on into hole 2
2. Connect to power supply
3. Turn the key switch 4 clockwise to turn on tester, indicator 3 will light up, tester is now working at 1000rpm/min.
4. Again turn the key switch 4 clockwise,you can adjust the working frequency between 1000rpm to 6000rpm/min.The higher the frequency, the stronger the spark strength.
Specification:
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.8 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 3
Design Is Great. Material Was A Very Poor Choice.
Color: Black, Size: 7.9" x 3.7" x 6.2"
The gauge of the wire used is pretty thin. There is no real weight to this item. It does do exactly what I need it to do as it allows me to dry my dish cleaning brushes and my Dawn Puff brush in an organized manner. The taller basket is nice especially for my long handled brushes. It would actually be nice if there was a second basket since I have more handled brushes than anything else. I am also really happy that I went with this design where the drain pan is the entire length rather than a little spout where all the drainage is focused. The full length lines up better to usage of each individual brush. Due to its materials, I don't have much confidence in this being around long. So far, the black coating has held up and no r*sting (do not want to jinx myself) has occurred, but if and when it does, I fully expect the metal to fold like a house of cards. The design is actually great. The materials are its Achielles' Heel.
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Reviewed in the United States on January 11, 2026
★★★★★ 5
Great quality
Color: Black, Size: 7.9" x 3.7" x 6.2"
Great quality and super sleek to set up on the counter behind the sink. Got it for my mom as she always put her sponge in the sink and dishes ended up on top and you had to dig for the sponge. She has used this everyday since! It drains just like it states and doesn't keep water. Love how this saves the life of the sponges and space in the area.
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Reviewed in the United States on February 4, 2026
★★★★★ 5
Works great for my space
This is the perfect size for my sink area and holds what. Need it to hold. Love the little drain tray, as it helps to dry what is in it and allows my counter to stay dry
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Reviewed in the United States on September 30, 2025
★★★★★ 5
Great organizer
Really happy with this little organizer. It’s the perfect size to sit next to my faucet, has a nice little drip tray, and is of good quality. Easily holds my dish soap, scrub daddy, and scrubber wand.
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Reviewed in the United States on October 28, 2023
★★★★★ 4
Handy and Functional
Likes-durable simplicity that holds and organizes sink side clutter. It’s cute for the kitchen with a farm, rustic, or industrial flair.
Only dislike- the water tray is a little tricky to remove if you’re in a hurry. It’s not enough I wouldn’t worry about buying this again, but, you will have to pay attention to remove and replace it.
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Reviewed in the United States on March 10, 2024