This is a Floor to Wall all aluminum Seismic Expansion Joint Cover, featuring a POP UP System, which is ideal for high grade marble, granite, limestone and paver floor/wall finishes. The “Zero Sight Line” effect is preferred by interior designers, who also appreciate that the Silicon Sealant system matches grout lines in their floor designs. The Centering Bar/Compression Spring assembly repositions the pan after seismic movement, reducing maintenance.