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Thunderbird Screw In Wood Post Insulator 25 Pack EF-17

Marsoni M251S
Sale price$38.95
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Get it in 3 business days with 1 day shipping. Friday, May 29
Thunderbird Screw In Wood Post Insulator 25 Pack EF-17Thunderbird Screw In Wood Post Insulator 25 Pack EF 17 screws in to wood posts. It has UV stabilised plastic moulded to a screw. This pack contains 25 insulators.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
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4.7 ★★★★★
Based on 168 reviews
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sue garland
Natrona Heights, US
★★★★★ 5
Easy install
Perfect fit
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026
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Verified Purchase
Chris
Los Angeles, US
★★★★★ 5
EPAuto stuff works and fits
Love their auto filters, tools and tire air compressers. EPAuto stuff works great and always fit!
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Reviewed in the United States on March 27, 2026
A
Verified Purchase
Amazon Customer
Natrona Heights, US
★★★★★ 5
Great price, easy install
OEM fit and very easy to install. No issues at all — everything worked exactly as expected.
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Reviewed in the United States on November 19, 2025
A
Verified Purchase
Ashley
Los Angeles, US
★★★★★ 5
Great filter
Always as expected, purchased multiple times!
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Reviewed in the United States on May 11, 2026
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Verified Purchase
Lori K
Cuba, US
★★★★★ 5
Good fit
Good fit
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Reviewed in the United States on April 12, 2026

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