chimney Model: S/S with twin wall and single wall, carbon steel, enamle Dia: 125mm, 150mm, 175mm, 200mm Thickness: S/S: 0.5mm-1mm, carbon steel: 1mm-2mm, enamel: 1.2mm Advantage over: 1. On the structure design of products, this is the umique technique in China, which it sloved problem for the outflow of condense water and wood bar 2. The outer shell of product is very brightness like the mirror, because it adpoted by staineless with high quality, which the precision is reach to BA grade. 3. The raw material is adpoted the products with high quality, which from the famous stainless maufacturing in China, then the products is processing by special equipment, which we invent it by oursleves, so the products is more durable.