Concrete Gray Engineered Marble: Contemporary Elegance and Understated Luxury. Manufactured with high quality materials and advanced technology to withstand daily wear and tear and maintain its impeccable appearance for years to come. Thickness: 3/4” Perfect for Bathrooms, Backsplashes, Jambs, Window Sills, and Floor Transitions. For Custom size by any side an length please visit the product listing B0CWLTJD4P Add a contemporary touch to your interior areas with our Concrete Gray Engineered Marble Threshold. Inspired by the industrial elegance of concrete, this threshold combines the urban charm with the durability and versatility of engineered marble to create seamless transitions between your floors.