Specifications 1.thermal insulation 2.ISO9001 3.The shape can do according requirment Vacuum formed ceramic fiber product is nonfragile material, and has high intensity, accurate dimensions which is available according to customers' need, and excellent fire-resistance and thermal resistance, even it can directly touch the fire. It can be special shapes, riser sleeves, flue liners, large cylinders, factory-lined stacks & duct on request. Its maximum temperature is from 1050°C to 1600°C.