Description BMC masks are compatible with the machines and pipes from other brands. The 5th generation BMC N5B nasal mask comes without a forehead frame provides better vision and comfortable seal. Package contains a complete nasal mask set with headgear and fittings for all sizes in one package. Three sizes: small, medium, and large included. Required for new CPAP and Auto CPAP users. Better vision, improved seal: The design for the N5B nasal mask comes without a forehead frame which increases visibility. It has a dynamic seal which makes for comfortable therapy. The  BMC nasal mask N5B model has a platform-based frame: The mask frame is compatible with different cushion sizes with a one-click lock. For more information don’t hesitate to contact us: [email protected]