Color: Nero Marquina Marble (black background with fine and compact grain and white veins); Size: 6"x36" Transition Saddle Threshold; Thickness: 3/4 inch; Finish: Polished (Glossy); Premium Grade Nero Marquina Marble Transition Saddle Threshold Single Beveled Tiles. Black Marquina Marble Polished 6x36 Transition Saddle Threshold Single Beveled Wall & Floor Tiles are perfect for any interior projects. The 6x36 Nero Marquina Venato Marble Transition Saddle Threshold tiles can be used for a kitchen backsplash, bathroom flooring, shower surround, dining room, entryway, spa. Our timeless Glossy Nero Marquinia Black Marble Threshold Single Beveled tiles with a large selection of coordinating products is available and include arabesque, fish scale, penny round, herringbone, basketweave mosaics, 12x12, 18x18, 12x34, subway tiles, moldings, borders, and more.