E-glass Also Known as Electrical Glass is the Standard Glass Composition Used for Most Glass Fibers. It is Made From the Oxides of Silicon, Aluminum, Calcium, Magnesium, and Boron.woven Roving is a Bidirectional Fabric Made by Interweaving Direct Roving. Woven Roving is Compatible With Many Resins, Such as Polyester, Vinyl Ester and Epocy Resins. Woven Roving is a High-performance Reinforcement And Widly Used in Processes Such as in Hand Lay-up, Molding, and Pultrusion for the Production of Boats, Automotives Parts, Furniture, Sport Facilities and Other Frp Products