This is a package with 2 pairs of foam ear cushions, a total of four (4) Plantronics replacement foam ear covers for use with Plantronics H251, H251N, HW251N, H261, H261N, H351, H351N, H361, H361N, HW261N headsets as well as the Polaris P251, P251N, P261, P261N, P351, P351N, P361, P361N