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Superior Firestop Thimble for 8-Inch Chimney Joist Penetration

Marsoni M251S
Sale price$101.00
Pay 4 payments of $25.25 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Superior Firestop Thimble for 8-Inch Chimney Joist PenetrationThe Superior Firestop Thimble (38FST) is an essential safety component for 8 inch chimney systems when penetrating a floor or ceiling joist. Built with heavy duty steel, this thimble provides maximum durability and helps maintain proper clearances to combustible materials during installation. It is designed specifically for use with Superior 8DM series chimney pipes to ensure a perfect fit. Proudly made in the USA, it ensures your wood burning
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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.
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4.4 ★★★★★
Based on 456 reviews
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Charles S. Fulton
Phoenix, US
★★★★★ 5
Cool shirt
Size: X-Large, Color: Black
Very comfortable and light weight. The material is like a moisture wicking material and feels cool on my skin. The shirt stretches and moves with you and is nonbinding in the areas of your arms and neck.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
R
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Rt
Bozeman, US
★★★★★ 5
Worth it
Size: 3X-Large, Color: Black
This shirt is light weight , comfortable, great quality and I would definitely get more
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 1, 2026
B
Verified Purchase
Bajecco
Birmingham, US
★★★★★ 4
Great Shirt, but a bit Heavy
Size: Large, Color: Black
Very comfortable shirt and good quality. My only gripe is that the material is a bit heavier than I'd like.
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Reviewed in the United States on March 19, 2026
T
Verified Purchase
Travis bowers
Port Orchard, US
★★★★★ 5
Perfect
Size: X-Large, Color: White
Quality is amazing, soft, comfortable and is light in weight. Fit is perfect for my frame and neck, love the style and was purchased at a good price.
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Reviewed in the United States on January 30, 2026
M
Verified Purchase
Michael Vavra
Alexandria, US
★★★★★ 5
Mock T-shirt
Size: Large, Color: White
Fit really well, liked the material.
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Reviewed in the United States on April 21, 2026

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