Monster Performer 500 Instrument Cable 21 ft. - straight 1/4 plugs P500-I-21 Balanced design for accurate frequency response and wide dynamic range. 95% coverage copper-braided shield rejects RFI and EMI for a lower noise floor and increased resolution. IsoTec vibration technology further reduces handling noise. Extra-flexible Duraflex outer jacket for superior reliability and cut resistance. Interchangeable, color O ring (available in blue, red, green, and yellow) attaches to each connector for customized identification.