Bisazza Blends 'Vetri Blends' Istanbul Blends consist of variations of 20 x 20 mm Italian Glass Mosaic Tiles to create stunning colour combinations. Istanbul contains: GM 20.30, SM 07 and VTC 20.46 Tiles. Order Module: 2.07 sq metres. Price is per square metre. Stucco/Grout Fillgel Plus - 7702 Blu Cobalto. We would always recommend Bisazza mosaic tiles are bought with the optional installation kit.