The DT-ZL1S SD is a replacement needle (replacement needle) that performs identical to the original needle that is not the manufacturer made for Victors 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 JV.30-ZL1S DT-ZL1S BLU (4951586175001).