High-quality strainers, Italian made With a 20-year warranty against rust and color change Strainer 10X10 normal for 6 Strainer 15X15 normal for 8.5 Strainer 20X20 normal for 11 Tile strainer 10X10 for 7 Tile strainer 15X15 for 11 Tile strainer 20X20 for 15 Tile strainer laser 15X15 for 13