Sennheiser · Official replacement (OEM)
Momentum 4 / Momentum 5 / HDB 630 Earpads
Verified as compatible with 1 headphone model.
Verified compatible headphones
Evidence
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cdn.sennheiser-hearing.com
The official MOMENTUM 4 Wireless manual describes removing the ear pad with its fastening ring, placing the new pad, and pressing it around the ear cup until it clicks flush.
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us.sennheiser-hearing.com
Sennheiser’s official page identifies the product as genuine OEM earpads, gives Article No. 700210, and explicitly lists compatibility with Momentum 4.