Rafter Support TW SteelInsulated Twin Wall Chimney SystemHeavy Duty, swivel type design to allow angle adjustmentOptions available,100, 125, 150 & 175mm €64.00 * Diameter: -- Select -- 100mm 125mm ( + €2.00 ) 150mm ( + €4.50 ) 175mm ( + €5.00 ) Item added to cart. Checkout Prev Next