... as filter cloth or fireproof material. (1)weight=900gsm (2)width=1020mm Description Basalt fiber fabrics,flame retardant fabric are woven from ... sqm --900g/sqm,the structure contain plain ,twill,stain,the material is our own fiberglass yarn, fiberglass sewing thread :fiberglass ... --900g/sqm,the structure contain plain ,twill,stain,the material is our own basalt yarn,basalt sewing thread :basalt sewing ...