Base/Intermediate Wall Support TW Stainless SteelInsulated Twin Wall Chimney SystemUsed to support the weight of the chimney, up to 10 metres.Options available,100, 125, 150 & 175mm €121.50 * Diameter: -- Select -- 100mm 125mm ( + €6.00 ) 150mm ( + €27.50 ) 175mm ( + €28.50 ) Item added to cart. Checkout Prev Next