The dedicated PP sleeve ring for RDM extension bar connecting the SDM mast: With these two white PP sleeve rings, the outer diameter of RDM is extended to be that of the SDM, so well inserted into the SDM mast, and the lower end is connected to the universal joint.

                                            Thin RDM sleeve ring (RDM to SDM)

                                                                         Extension bar： 45cm

                                                                         Materials：Aluminum