Basalt Roving(Basalt weaving yarn) TEX Value: 100tex ~ 4800tex Fiber Dia: 9um ~ 17um Basalt Roving(Basalt weaving yarn)It is made by basalt material and yarn density is 100tex, 200tex, 300tex till 4800tex. This kind of yarn is specially used to weaving basalt fabric with plain, satin, unidirectional, ±45 degree and each bobbin is 4kg or 8kg.