Replacement Ear Pads for Sennheiser HD 300/ 400S/ 4.20/ 4.30/ 4.40/ 4.50 BT BTNC/ 4.40BT/
Sennheiser HD 4.20s Black 3.5 mm Wired Headband around Ear Earphone Headset | eBay
Sennheiser HD 300 Over-Ear Headphones
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