The SN-25 SD is a replacement needle (replacement needle) that performs identical to the factory needles produced by the manufacturer for SANSUI record cartridges. This replacement needle is a "synthetic diamond needle" type. This is a generic model that plays a regular range of sound ranges, with a standard conical shape. General life is about 200 hours. The successor to the SD.56-25 SN-25 GRY (4951586350606).