Selkirk 4" to 8" Stainless Flex Length 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

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

Flex liner is available in .006" thick steel which is thicker and stronger than .005" steel.

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)
194168 4MF25SFL 4"x25'
194169 4MF35SFL 4"x35'
195170 5MF25SFL 5"x25'
195171 5MF35SFL 5"x35'
1955172 55MF25SFL 5.5"x25'
1955173 55MF35SFL 5.5"x35'
196174 6MF25SFL 6"x25'
196175 6MF35SFL 6"x35'
197176 7MF25SFL 7"x25'
197177 7MF35SFL 7"x35'
198178 8MF25SFL 8"x25'
198179 8MF35SFL 8"x35'

CA Residents: 
See Prop 65 WARNING.


Lifetime Limited Warranty

Refer to the Smart Choice Warranty for full warranty details.