The Shieldmaster single to twin wall adaptor is the very first twin wall flue component you shall require for a twin wall flue installation. This connects either directly to the stove spigot and then upwards to the twin wall pipes or to a length of enameled single wall pipe that comes out of the top of the stove.
The recommendation is that it should come straight out of your stove along with a length of enamel pipe; this particular pipe is cheaper as well as harder-wearing. Use fire cement to attach this part to the spigot or the stove pipe; the top will connect straight to the twin wall pipes and does not come with a Locking Band.