With a specific dimple arranged in a spiral, it suppresses the sound of the sound. Adopt ""Spiral Dot"" on the inner wall of the earpiece. This item is 100% authentic and unused. Compatible models: HA-FX1100, HA-FX850, HA-FX750, HA-FX700, HA-FX650, HP-FX650, HA-FXT200, HA-FXT200LTD, HA-FXT100, HA-FW01, HA-FW02, HA-FW03, HA-FX99X-B, HA-FX99XBT, HA-FD02, HA-FW02BT, HA-FD02BT.
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