Document YrGjGZVVDNMYq1exV7X48d2XV

(h) Drum brake lining segments consist of a solid, curved, dense, grayish material. Typical arc lengths range from 90' to 130' and are for drum diameters of 7, 8, 9-1/2, 11, 12 and 12-1/2 inches; (i) Drum brake linings are one component of a vehicle braking system. (j) Not applicable. AS TO DISC BRAKE LININGS: (a) GM began the manufacture and sale of disc brake linings in 1966; (b) Outside suppliers of drum and disc brake linings were Johns-Manville, Abex Corporation, Eaton Brake Division, Dana Axle, American Coleman, Delco Moraine, Inland/Inlite, B.F. Goodrich, Bendix, Dayton Walther, H.K. Porter, Kelsey Hayes, Kelsey Products Division, Rockwell International, Unibond Brake, Wagner Electric, Raybestos Manhattan, Friction Division Products, Ferodo, ITT AMCO, Multibestos, Universal Friction, Akebono, AMCO and Marshall Eclipse; (c) Trade Names: AC Delco, Delco Moraine, GM Parts, Goodwrench; (d) See response to (a). (e) GM disc brake linings have one or more grades of chrysotile asbestos, generally grades 5, 6 and 7, and the approximate percentage by weight ranged between 30% to 60%. The grade of chrysotile asbestos used in disk brake linings purchased by GM is unknown. The details of the formulations for friction materials are trade secrets, the disclosure of which is unnecessary in this case and would destroy the value of GM's investment in their development. (f) GM ceased the manufacture of disc linings containing asbestos in 1985 because of production priorities. (g) Not applicable. (h) Disc brake linings segments are a dense grayish or tan material. Typical dimensions are height 57-63 millimeters, width of 125-142 millimeters, and thickness of 11-13 millimeters. 5