beyerdynamic Headphone Adapter Screw M8 - adapter scewable 3,5 mm to 6,3 mm with M8 screw thread, for headphones with M8 thread as plug adapter useable; fits for beyerdynamic DJX1; DT 250; DT 290, DT 291, DT 294, DT 297; DT 331; DT 431, DT 440, DT 440 Edition; DT 531; DT 660, DT 660 Edition; DT 770, DT 770 alt, DT 770 Edition, DT 770 M, DT 770 PRO, DT 770 PRO HT; DT 831, DT 860, DT 860 Edition, DT 880, DT 880 alt, DT 880 Edition; DT 931, DT 990, DT 990 Edition, DT 990 PRO; DTX 700, DTX 800, DTX 900, DTX 910; DT1350; TYGR 300 R