125mm / 1m - Chimney Flexible Flue Liner:

High Quality Stainless Steel Multi Fuel Pipe.
Flexible metal acid resistant steel used where cannot be used straight element chimney liner.
This multi-fuel flexible fuel liner is heats approved and suitable for lining existing chimneys.
Having a flexible flue liner will help the efficiency of your stove and also the way fuel burns as well. 
It is also highly recommended especially if you have cracks and leaks in your existing chimney.

Specifications:

Inside Diameter -125mm
Length - 1meter
Thickness 0.10mm (DN500).
Sort of Material - Stainless Steel, type 1.4404.
Temperature Level - T450.
Gas Tightness(pressure class) - N1 (40Pa).
Condensate penetration resistance – W.
Durability against corrosion – Vm.
Soot fire resistance – G.