About this item It can be used for Technica ATH M40X, ATH M50X, ATH M60X, ATH M70X. Made of metal materials, sturdy and has a long service life. Small size, simple and convenient to use and operate, practical and useful, plug and play. Also used for HD518, HD558, HD595, HD598, HD569, HD579, HD599 and other headphones. Delicate appearance, not easy to damage, and you can use it for a long time. Dimensions: 0.39 x 0.39 x 0.39 inches.