NPT 3D:TGUFH 7" x 18" Tundra Gray Marble U/H L. Panel - The timeless elegance of marble can transform any outdoor area into a beautiful, inviting space. Swirls and striations from the distinct pattern only found in marble, while the cool tones enhance the natural serenity of any open-air setting. Tundra Gray captures the intricate patterns of frosted, icy plains.