Its the filters used on the tygr 300r. Earpads TYGR 300 R|beyerdynamic
Comes with new pads.
Have to email beyerdynamic for an order form to order just the filters.
The product number is
934208 - TYGR/Amiron Wireless Foam Disc - $3.50 each
Cost for a single foam disk filter so have to order 2.