... / PA11 / PA12. 3.Color:black,natural white,etc. 4.ISO9001:2 Cast nylon rod Color: Natural white, black, other color can be customized Diameter ... very tough, even at low temperatures, and high hardness in the surface, toughness, mechanical lower shock, and abrasion resistance. ... touch overmuch acid. 3. Poor lightfastness, poor endurance in pollution. III.Cast nylon rod Machining Solution Available for ...