Asbestos Centre Manufactures asbestos yarns in a wide range of constructions with a wide range of properties dependent on the various applications intended. However, they are commercially distinguished under the following groups: A) Non-metallic B) Metallic-incorporating metal wire The size, diameter, or "count" of a Asbestos yarn can be expressed in many ways. The modern international method used is the TEX system. The "TEX NUMBER" indicates the weight of yarn in grams per KM. of length.