This product is either discontinued or we cannot get that from suppliers.
Poly Plantronics Spare 40709-02, Ear Cushion, Black, Material Foam, Compatible with H251, H251N, H261, H261N, H351, H351N, H361, H361N, HW251, HW251N, HW261, HW261N.
Replacement foam ear cushions for Encore and Supra headsets. One pair. Black.