Rubber, gutta-percha, gum, asbestos, and mica, all for use in the manufacture of linings, padding material and cushioning; plastics in extruded form for general industrial use; packing and stopping material for forming seals; flexible pipes, not of metal; partly-processed friction materials for brake lining; shock-absorbing buffers of rubber for industrial machinery; insulators for machinery cables; caulking compounds; clack valves of rubber for use in pumps; clutch linings; compressed air pi...