Superior Firestop Thimble for 8-Inch Chimney Joist Penetration

Superior Firestop Thimble for 8-Inch Chimney Joist Penetration

Marsoni

M251S

$101.00

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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Runs much larger than I expected. I am 5’4”& 136 pounds. Usually wear a medium or large in some knit tops. So I need to stitch the side seams in hopes it will fit better. I like the weight and softness of the fabric, but really disappointed in the too large armholes. Unwearable for me until I can sew new side seams.

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Reviewed in the United States on February 11, 2026

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Shopper

West Palm Beach, US

★★★★★ 5

Versatility simple top

Size: X-Large, Color: White

Comfortable and well made top. Simple but versatile dress it up or casual, this top is a basic much needed wardrobe addition.

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Reviewed in the United States on February 11, 2026

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Hart Smith

Carnegie, US

★★★★★ 5

Great looking Cotton tank

Size: Small, Color: White

Love this tshirt. Have worn but not washed yet. So will add when I know if it shrinks

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Reviewed in the United States on February 8, 2026

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thunderkitten

Pawtucket, US

★★★★★ 1

I wouldn’t call it a ribbed shirt if it’s almost see through

Size: Medium, Color: Black

Cheap thin looking fabric returned it

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Reviewed in the United States on February 13, 2026

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Boise, US

★★★★★ 3

Runs large with gaping arm holes.

Size: Large, Color: White

This runs extra large and the arm holes are gaping. You can see your undergarments through the arm holes. I am hoping that the shirt shrinks in the wash.

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Reviewed in the United States on January 17, 2026