The DT-33S SD is an alternative 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.30-33S DT-33S GRN (4951586172208).