The durable OneRacks® are molded in a single, continuous piece. No assembly required and no detachable pieces. The racks are made of PP. They are sturdy and highly resistant to acids, bases, solvents and heat. - Not autoclavable. - High chemical and heat resistance (0 to 110 °C). - Stable design for use in water baths. The durable OneRacks® are molded in a single, continuous piece. No assembly required and no detachable pieces. The racks are made of PP. They are sturdy and highly resistant to acids, bases, solvents and heat. - Not autoclavable. - High chemical and heat resistance (0 to 110 °C). - Stable design for use in water baths.