The DN-59ST SD is an alternative needle (replacement needles) that performs identical to the original needles produced by the manufacturer for ONKYO 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 OS.58-59 DN-59ST BLK (4951586293507).