Basalt Gray 4 in. x 12 in. Field Tile will transform your space. The subway tile's striking dark grey color features blue understones for a unique look. The basalt stone's smooth honed finish creates the perfect combination. Recommended for backsplashes, bathrooms, kitchens, floors, and accent walls. Combine with other mosaics and field tiles to create impressive installations. For best installation results, use white polymer-modified thinset. 1 square foot, 3 pieces per square foot. Weight per square foot is 4.18 lbs. Grade 1, first-quality basalt tile for wall and residential floor use 4 in. width x 12 in. length x 8 mm thick Unglazed honed smooth finish with a uniform - same shade tone variation P.E.I. rating is not rated for natural stone, glass, metal and or other unglazed products Non-Vitreous flooring has water absorption of more than 7% for indoor use Not frost resistant Residential for wall and floor use/commercial use for wall only Don't forget your coordinating trim pieces, grout, backerboard, thinset, and installation tools All online orders for this item ship via parcel ground and may arrive in multiple boxes It is recommended you purchase a minimum of 10% overage to account for design cuts and patterns. All natural stone has substantial shade variations; mix tile from all boxes to ensure the best results This item is available for in store purchase only