What is happening? 1. Your microphone handheld just got old and aged; 2. The inner foam messy and broken; 3. Broken, not-good-smell existing and so on. Don't worry, it could come from long-time use of your mic,and/or without proper maintainence. Though- rather than buy a whole new system. Now you can just replace the grille set itself. Bring new life to your microphone handheld with good look and cleaning. - This is replacement interior foam fitting for Shure SLX24 SM58, SM58a, SM48, PGX Beta58, PG58 series wired and wireless microphone handheld, as well as any brand with the similar size mic head grille cover ball. Perfect to renew your microhone - Very good quality to match the original mic on assembly; - Easy to make your micophone work properly with the new replacement in place.