Designed specifically for use on highly-polished floors, Wearwell's Grip Strips will prevent sponge-backed mats from moving out of place. They are so effective that only a few are needed even in high trafficked areas. This unique polymer is permanently tacky and does not promote bacterial growth. If it ever gets dirty, simply wipe it off with Simple Green or a similar product. One package contains (4) 6" x 6" strips. Color: Blue