The N-78 SD is a replacement needle (replacement needle) that performs as the original needle, which is not the manufacturer made needles for use with KENWOOD (TRIO) 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 TR.55-78a N-78 RED (495158644268).