Property and usage: This product is a kind of alkali-free glass fiber fabrics produced by utilizing abroad advanced technology and equipment. By means of a surface treatment it has excellent electro-insulation property and workability. It is used mainly in printed circuit boards, and is also used as base materials for computers and home electro-devices. Main technical index: Value: E-glass Alkali-metal content: <0.8% Flammable substance content: 0.075%~0.25% Treated agent: Silicone Thread density x strand nuber: End 68 x 1 weft 68 x 1 Construction: End 17.3 +/- 1 weft 12.6 +/- 1 Tensile strength: End direction > 294 weft direction >250 Thickness: 0.190 +/- 0.025 Width: 1270 +/- 10 Mass: 204 +/- 8 Roll length: 1000 +/- 200 Weave: Plain Note: The properties above said are tested according to test method Q/PCGO15-1999. Equivalent to American designation 7628; The specification of fabric, agent and its content according to the agreement of buyer and supplier.