Thermcraft’s vestibule blocks and insulation tubes are high quality, high purity, vacuum formed ceramic fiber with a low sodium inorganic bond. Made to customer specifications, these are available to fit all diffusion furnaces and specialty insulation applications.
Top Quality…Prompt Delivery…Reasonable Prices…Custom Made to Customer Specifications…
Stepped or straight blocks are available for either load or source end. Inside diameters are available in 1/8″ increments. Eccentric I.D. blocks are also available.