These Earpads and headband cover were made to be compatible with: ATH M50X / M50 / M50XBT ATH M40 / M40X / M40FS ATH M30 / M30X ATH M20X Headphones. Includes 2 Upgraded ear pads with plush memory foam and improved PU leather, and a headband cover. Make your ATH M Series Headphones last longer!