Approvals:
USA: UL 1777 Chimney Liners
Canada: ULC S635 Liners for Existing Masonry and Factory-Built Chimneys and Vents 

Specifications:
Liner Material                                  Aluminum 3003, 2-ply (0.005" each)
Maximum Flue Gas Temperature     470° F
Available Size Range      3" - 8" dia.
Kits      25' and 35' (15' Kits available for 3", 4", 5")
(more lengths available as Special Order) 
Stretch Ratio 5:1 (approx.)
Clearances 0" between liner and chimney interior
0" between combustible materials & chimney exterior 
Warranty "Smart Choice" Lifetime Warranty
STRONG - DURABLE - FLEXIBLE