... Tough, transparent, high cost Handles, eyeglass frames Polyamide 6 (Nylon) PA6 Akulon, Ultramid, Grilon High strength, fatigue resistance, chemical resistance, low ... cost Bearings, bushings, gears, rollers, wheels Polyamide 6/6 (Nylon) PA6/6 Kopa, Zytel, Radilon High strength, fatigue resistance, chemical resistance ...