MK cables are extremely flexible, resistant to handling microphonics and reliable under the roughest conditions. Accusonic+2 features finely stranded center conductors and braided shield for superior noise rejection. Stock lengths are 3, 6, 10, 15, 20, 25, 30, 50, and 100 ft., custom lengths available on a special order basis. The model number is formed by MK4 + cable length. For example: MK450. (Featuring limited lifetime warranty*)