Increasing Adapter To Vitreous (5 - 6 Inch) - Twin Wall Flue 
DINAK DW TWIN WALL INSULATED 30º ELBOW Ø180 (7 inch) 
Flex Liner To DW Mounting Plate (6 Inch) - Twin Wall Flue 
DINAK DW STORM COLLAR Ø180 (7 inch)
£50.18
THe Dinak DW Twin Wall Flue System Storm collar is used as extra protection above the flashing where the flue passes through the roof.
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