The black Audio-Technica HP-EP Replacement Earpads are compatible with the company's M-Series headphones. They are compatible with the ATH-M20x, ATH-M30x, ATH-M40x, ATH-M50x, ATH-M50, ATH-M50s and ATH-M50RD model headphones.
Compatible with: ATH-M20x, ATH-M30x, ATH-M40x, ATH-M50x, ATH-M50, ATH-M50s, ATH-M50RD