Selkirk 4" to 8" Stainless Flex Length Smoothwall Liner (Stainless Flexible Liner)

Length: 25-Feet
Diameter: 4-Inch

Estimated Arrival: Between and . (To All Contiguous States)

✔ Same-Day Order Processing
✔ Free Returns
✔ No Restocking Fees
✔ Financing Options Available

Text or call 888-992-1556, start live chat, or email with any questions. Our team is available to serve you 8:00 AM - 11:59 PM ET, 7 days a week.

Selkirk  4" to 8" Diameter, 25' and 35' Stainless Flex Length Smoothwall Liner

Smoothwall Liner that has superior flexibility with a high BTU capacity.

Its smooth interior allows for more airflow, reducing drag by 20% over traditional corrugated liners.

Smoothwall is made from 2-ply 316 stainless steel which makes it ideal for any application.

SFL - Stainless Flexible Liner

Flexible Stainless Steel Liner is a high performance chimney liner. An integrated hose clamp connection on each component allows quick, easy and secure assembly. No adaptors or fasteners required.

4" to 8" Diameter:

  • 316 Stainless steel
  • Complete Kits, Insert Kits & Pellet Kits available
  • Smooth wall liner is an easy to clean option with higher BTU capacity and superior draft performance
  • Insulation-wrap promotes quick heat up, enhances draft and allows zero clearance between liner and masonry chimney 
  • Can be installed on gas, oil or wood appliances
  • Full line of accessory components
  • Smart Choice warranty on all components


  • Listed to UL 1777 (Flexible Stainless Steel Liner installed with Insulation Wrap) in the U.S.A.

Part Number Product Code
Size (Diameter x Length)
194180 4MF25SFLS 4"x25'
194181 4MF35SFLS 4"x35'
195182 5MF25SFLS 5"x25'
195183 5MF35SFLS 5"x35'
1955184 55MF25SFLS 5.5"x25'
1955185 55MF35SFLS 5.5"x35'
196186 6MF25SFLS 6"x25'
196187 6MF35SFLS 6"x35'
197188 7MF25SFLS 7"x25'
197189 7MF35SFLS 7"x35'
198190 8MF25SFLS 8"x25'
198191 8MF35SFLS 8"x35'

CA Residents: 
See Prop 65 WARNING.


Lifetime Limited Warranty

Refer to the Smart Choice Warranty for full warranty details.