Seymour Duncan STK-S4M Classic Stack Plus Stratocaster Middle Pickup, BlackThe Seymour Duncan STK S4m Classic Stack Plus middle pickup brings the bell like tone of a vintage Stratocaster single coil, without the unwanted 60 cycle hum. So, when youre playing that loud room, wax potting and an injection of negative hum via the bottom coil work to clean up unwanted noise and squeal. The STK S4m noiseless Stratocaster pickup slots in the middle position with sturdy Alnico 5 magnets. This passive pickup comes in a black cover and