Generic A Pair Replacement Ear Pads for DT770 DT551 DT880 DT990 DT531 DT801 DT440 DT660 Beyerdynamic DT770 compatible DT551 DT880 DT990 DT531 DT801 DT440 DT660 May also be used for AKG K240S K271S K240M, Denon D2000 D5000 D7000 Flexible, durable and high elasticity The atria are round with an outer diameter of about 100 mm, the inner diameter is about 47mm, and the opening of the rear side is 76 mm More comfortable for your ears