Exelia PVC Interlocking Floor Tile 19.7in X 19.7in 7mm Blue (6 Tiles) Exelia LW has a hidden interlocking system that can be installed in an "in line" or "offset" Exelia is cost effective and the seamless installation process is easy and fast. Exelia LW is a great solution for gyms, yoga centers, garages, workshops, stores, playrooms, etc. Exelia LW carries a life time limited warranty! $2.81 per sq/ft