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Ohm Resistance Box

Marsoni M251S
Sale price$29.80
Pay 4 payments of $7.45 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Ohm Resistance BoxIncluded: 1 x Resistance Box and 1 x Manual. Use it to teach student electrical knowledge. Great teaching aid and experiment equipment. Resistance obtainable is from 0 ohm to 9999. 9 ohm. Premium Quality: Resistance Box is made of high grade construction all the way through, excellent build quality and proven reliability across the range. Designed for use in professional laboratories but is an ideal choice for science classrooms and household use. If
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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]
  • Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 589 reviews
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Scottytoohotty
Port Orchard, US
★★★★★ 1
DO NOT BUY THIS GARBAGE
Size: 20-35 HP
DO NOT BUY. Stopped working after 2nd trip total of 2 hours use. Not returnable after 30 days. Could easily ruin your engine. Expensive garbage.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 19, 2026
T
Verified Purchase
Thomas W.
Phoenix, US
★★★★★ 5
Looks very good quality to me.
Size: 85-300 HP
Everything looks good quality to me. I find it odd that the people leaving bad reviews with pictures of broken and melted impeller, when you can clearly see the brass on the inside is brown and dirty like old pennies and mine is shiny new. It's almost like the took the pictures of the ones they replaced to get a refund and a free repair kit.
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Reviewed in the United States on April 26, 2026
K
Verified Purchase
Kris W Cayton
Cuba, US
★★★★★ 5
Great quality and price
Perfect fit. Received quicker than boat shop
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Reviewed in the United States on June 22, 2025
R
Verified Purchase
Roger
Houston, US
★★★★★ 5
Easy to install if you watch some online how to videos.
The water pump kit worked great on my 35 year old, 2 stroke, 100hp, Mercury Outboard.
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Reviewed in the United States on May 15, 2025
M
Verified Purchase
Mike M.
Draper, US
★★★★★ 4
Very good shipped and received fast
Missing one bottom gasket. Maybe factor made changes from old style
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Reviewed in the United States on July 10, 2021

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