Selkirk 6" to 8" Insulated Wall Thimble (UltimateONE) Size:8-Inch the duct is corrosion resistant

the duct is corrosion resistant as well as high static pressure thanks to the unique four-layer lamination process and wall thickness

a square design

and poker—providing everything you need to manage your fire with ease

1/2 inch gas inlet

Brushed Silver

Selkirk 6" to 8" Insulated Wall Thimble (UltimateONE) Size:8-Inch the duct is corrosion resistantSelkirk 6" to 8" Insulated Wall Thimble Required where the chimney passes horizontally through a combustible wall. Will accommodate a wall thickness of 12". Adjustable Trim Cap in a decorative matte black finish. Matte black finish Trim Collar. Factory installed insulation between shields. Ultimate One Chimney UltimateONEs inner liner and outer casing are constructed of all welded 304 stainless steel for superior strength and corrosion resistance.