The N44-7 DJ IMP SD 2-Pack is an alternative needle (replacement needles) that does not have the same performance as the factory needles used for SHURE 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 SH.192-44-7/DJ IMP WHT two-piece (4951586483038).