Dentsply Rinn Brand X-ray Supplies Supplies, Recorder Code 54-0929 The plastic pieces are porous and have a limited life. It is possible they will absorb the chemicals used in sterilization and react to temperature variation. Your plastic pieces should be replaced periodically. Rinn Xcp and Bai instruments are designed to be used in a steam autoclave. Other forms of sterilization are not recommended. • Red wing bite block • Box of 6