Communications Ear Plugs (CEP) Replacement Foam Ear Tips (2 pairs), tube of replacement foam ear tips (2 pairs) for all types of CEPs, available in the following sizes: Standard: NSN: 5965-01-504-0071; Slim: NSN: 5965-01-504-0072; Short: NSN: TBD; Large: NSN: 5965-01-591-4342; Mixed Sizes (Slim & Standard) NSN: 5965-01-504-1051.