Bisazza Blends 'Blends 20' Silvia Blends consist of variations of 20 x 20 mm Italian Glass Mosaic Tiles to create stunning colour combinations. Silvia contains: SM 29 and SM 31 Tiles. Order Module: 2.07 sq metres. Price is per square metre. Stucco/Grout Fillgel Plus - 6601 Rosa Perla. Blends 20 Tiles have installation kit included in the price. We would always recommend Bisazza mosaic tiles are installed using the installation kit.