This is a 5-Pack of AirVape XS replacement screens, consisting of two chamber screens and three sturdier screens for the XS mouthpiece. The AirVape mouthpiece screen is part of a cooling system that sifts vapor to lower its temperature before the vapor reaches your mouth. AirVape XS screens are built with high grade metal, and designed for thorough filtration of dry herb vapor. Removing and inserting these screens is easy. Simply remove the mouthpiece and remove either the mouthpiece or chamber screen, then insert the replacement screen.