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Superior Flexible 18-Inch Vent with Square Termination for 4.5x7.5-Inch SecureFlex Direct Vent System

Marsoni M251S
Sale price$213.50
Pay 4 payments of $53.38 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Superior Flexible 18-Inch Vent with Square Termination for 4.5x7.5-Inch SecureFlex Direct Vent SystemThe Superior Flexible 18 Inch Vent with Square Termination for 4. 5x7. 5 Inch SecureFlex Direct Vent System provides a premium accessory for use with your gas fireplace. Featuring heavy duty construction, this unit has been built to last. This kit includes a 18 inch compressed flex vent, flex adapter, fireblock spacer, two clamps, and square termination.
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Your Superior Flexible 18-Inch Vent with Square Termination for 4.5x7.5-Inch SecureFlex Direct Vent System orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

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You'll receive a tracking link by email once your Superior Flexible 18-Inch Vent with Square Termination for 4.5x7.5-Inch SecureFlex Direct Vent System ships.

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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
4.8 ★★★★★
Based on 1000 reviews
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A
Verified Purchase
Amazon Customer
Houston, US
★★★★★ 1
Too restrictive!
If you like air flow do not buy this filter. I put it in my 2020 Super duty and had very little air coming out with the fan as high as it would go. Stopped and bought the standard Microguard from Orielly's. I changed it in the parking lot and Bam!!! back to blowing my hat off!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
A
Verified Purchase
Amazon Customer
Fort Morgan, US
★★★★★ 5
Great price
Both filters fit and worked and had a great price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 15, 2026
M
Verified Purchase
maria sames
Alexandria, US
★★★★★ 5
Better then oem
Great product quality is definitely a plus had no issues. Been buying these for 3 years.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 19, 2025
C
Verified Purchase
Craig Miller
Lexington, US
★★★★★ 5
Quality filters
Perfect fit, no issues with the installation of these filters.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 8, 2026
A
Verified Purchase
Amazon Customer
Lake Worth, US
★★★★★ 5
Prompness
Great job
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 23, 2026

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