This is a single replacement Earpad for the Sony MDR-7606 and MDR-V6 headphones.
Anchor Audio H-2000S Single-Earpiece Headset
Anchor Audio PortaCom H-2000 Dual-Earpiece Headset
Azden HS-11 Unidirectional Headset Microphone
Azden Omni-directional Headset Microphone for 31LT 32BT and 10BT
Califone 3064-USB Lightweight 25ohm Stereo Headset With USB Connector