This is a Floor to Floor Thermal Expansion Joint Cover, featuring recessed-mount frames that minimize sight lines, and a snap-fit design for easy on-site assembly. The dual flexible seals provide a secure fit and yet retain flexibility. The below-floor blockout design adapts easily to many different floor finishes. Extra wide joint widths are available, as well as an optional vapor barrier that slides into the frame for easy installation. Additional options include water & fire barrier.