DuraVent DuraFlex SW 4" x 160' Stainless Steel Custom Length w52 Sleek round edge won't scratch

Sleek round edge won't scratch people very safe for home uses

add-on feature (on/off switch) is sold separately

Battery-operated wired transmitter

Model PENTA18FPPK-FLEX Dimensions L-18" x W-18" Max BTU 65

DuraVent DuraFlex SW 4" x 160' Stainless Steel Custom Length w52 Sleek round edge won't scratchDuraFlex SW is a smooth inner wall, flexible stainless steel chimney liner. The smooth inner wall provides for no output reduction allowing for full appliance efficiency. Smooth wall construction eliminates ridges that restrict flue gas flow and collect deposits. The lack of ridges facilitates cleaning and maintenance. DuraFlex SW is ideal for relining masonry chimney for wood and gas burning appliances. Listed to UL 1777. What's Included Length