Silvacore Pro by Duraflue Base support bracket adjustable (7-37cm from wall to pipe): 5", 6", Silver, Black.Load bearing and usually fitted at the foot of multiple metres running up a wall. This part also works upside down as can be seen in one of our smaller images. This is a twin wall clip together chimney part used to build a new chimney. Twin wall clip together chimney can be as close as 5cm to combustible materials (7cm if passing through a sealed void). No glue or sealants required. When we say 5 or 6 we speak of internal diameter: outer diameter is