Arrow Grey 10.25x12.5 Through-Body Glass Mosaic: Crafted from elongated hexagon pieces of hot glass, this mosaic adds a touch of modern elegance to your swimming pool. The through-body construction ensures consistent color and durability. For installation, we recommend using MAPEI Adesilex-P10 Premium Glass Tile Mortar mixed with MAPEI Keraply Latex Mortar Additive as the thin-set. As for grout, consider options such as MAPEI Ultracolor Plus FA, MAPEI FlexColor CQ, or BOSTIK Trucolor Rapidcure. These grouts provide both functionality and aesthetic appeal.”