Upgrade Ear pad earpad replacement for Sony MDR-NC6 MDR NC6 headset Headpone Replacement ear pads for AKG K518 K518DJ K518LE K81 Headphones Outer diameter:Approx. 75mm. Thickness: Approx. 17mm Materail: Sponge and wet process PU leather The Ear Pads Cushion are ONLY compatible with the original AKG K518 K518DJ K518LE K81 Headphone. Before purchasing, please check whether the products are compatible with your products