Phenolic Washers are stamped from various industrial laminates, such as Paper, Canvas, Linen, Glass Grades G-3, G-5, G-7, G-9 G- 10 and G-11, and Glass Polyester – GPO 1, 2, and 3. These washers are laminated in several grades, including XP, Conolite, CEXXXP, CEF, LE, XXP and others, usually in the material color or black. NAS549 electrical insulating washers are available in a variety of material: Fibre (F), Paper Phenolic (-), three types if Cotton Phenolic – FBM (M), FBG (B), FBE (E), Glass Melamine – GMF (P), and Glass Epoxy – GEB (G).