Leatherette Cushion Black measure 1.75" across with a 1.25" opening.Compatible with: All Chameleon, Mustang, Smith Corona headsets as well as Plantronics H251, H251N, H261, H261N, HW251, HW251N, HW261, HW261N, H351, H351N, H361, H361N, MS250, MS260
H91, H91N, H101, H101N, H51, H51N, H61, H61N
Compatible with: H31, H31CD, H41, H51, H61, H81, H91, H101, H141, H171, H251, H261, H351, H361, HW251, HW261
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Reviewer: Kenneth from Springfield, MO