Glass Fibre Cloth, Style-HT2025, Plain, 0.03 inch ,17 oz/yd2, 550 Degree C. Heat cleaned. It is a non-asbestos fiberglass fabric, with heat cleaned, continual working temperature 550 Degree C. , used as welding blanket, filter bag, fire resistance curtain, wrapping material, not treated with heatment (Style. 2025) insulation texturized fiberglass cloth