The J44A 7 IMPD SD is a cartridge that works with SHURE N44G record needle and our replacement needle N44G Rich musical and dynamic sound. The powerful bass not found in the J44D produces a solid core sound. The same specification as the M44-7 and is also compatible with SHURE record needle N44-7. The successor to the SH.J44A 7 IMP(4951586010043).