4″ AZUSALITE WHEEL FOR 1-3/8″ BALL BEARINGS, ONE HALF ONLY, 1.5″ WIDE

2.92″ Bolt Circle. Zytel® is a series of nylon resins by DuPont Corporation. Azusalite Wheels are molded from a glass-reinforced, alpha crystalline, Nylon 6 resin designed to provide an optimal combination of tensile, impact and flexural strengths.The resulting Azusalite wheels are strong, resilient and durable. Corrosion and solvent resistant.