The EPS-270SD SD is an alternative needle (replacement needle) that performs identical to the factory needles that are not the original manufacturer made for use with National(Technics) 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 N.36-270 EPS-270 SD, DD TR.GRN (4951586254706).