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Motorola SURFboard Model SB6121 Cable Modem Fast, Reliable DOCSIS 3.0 Open Box.

Motorola Surfboard eXtreme Cable Modem SB6121 DOCSIS 3.0 Open Box

Motorola Surfboard SB6121 DOCSIS 3.0 Cable Modem

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Motorola SURFboard Cable Modem SB6121 DOCSIS 3.0