The PZP1004 SD is an alternative needle (replacement needle) that performs as the original needles produced by the manufacturer for Pioneer 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 P.53-1004a PZP-1004 YEL (4951586333517).