Nbbox Ear Pads Replacement Compatible AKG K 240 Superlux HD 668B Superlux HD-681 Samson SR850 Samson SR950 ATH AD500X Sony MDR-CD570 Headphones It's just a replacement earphone pads, not the original brand product, NBBBOX does not assume any liability for the patent. Package includes 1 pair of replacement earpad. Attached there is a professional NBBOX flannel bags, Flannel bags can be accommodated headset data lines, and small accessories,to make your travel more convenient. The Ear pads will fit models: K240 K240S K241 K271S K240MK2 HSD271 HSC271 Superlux HD 668B Superlux HD-681 Samson SR850 Samson SR950 ATH AD500X. Dimensions: Round outer diameter 4.2" with opening 2".