Koss Headphone Carrying Case for UR40, UR29, UR18, HQ1, SB45, and QZPro (Discontinued by Manufacturer) Large size accommodates Koss UR40, UR29, UR18, HQ1, SB45, and QZPro headphones Durable covering protects headphones Clamshell design Sturdy zipper Available in 3 additional sizes to fit a variety of Koss headphones