EMG 81TW Guitar Pickup The 81TW humbucking pickup takes an EMG classic to a new level. The dual-mode design allows for maximum flexibility, with the original 81 providing all the crunch and aggressiveness its famous for and an all new single-coil that features a fatter tone with plenty of punch and clarity. Either mode is accessed through a push/pull pot for versatility. Dual internal preamps, one tuned for single-coil mode and the other for dual-coil mode, give the 81TW two distinct sounds while delivering EMGs well known noise cancelling technology in both modes. NOTE: Standard EMG humbuckers are 0.9” thick. The 81TW thickness is 1.1”. Difference of 0.22”.