The PosiTector RTR Shim Set (model STDCSSRTR) is a precision calibration tool designed to verify the accuracy and operation of PosiTector RTR and other spring micrometer replica tape readers. Ideal for fulfilling both ISO and in-house quality control requirements, this set allows users to check the height (H, HL) accuracy of their instruments in-house. Each shim is individually serialized and includes a Certificate of Calibration traceable to PTB, ensuring compliance with industry standards. The set is compatible with PosiTector RTR H and PosiTector RTR 3D models.