Highly Durable and Long-Lasting. Non-porous, do not requiere sealing. Polished finish that highlights the texture and deep tones of black granite, adding a touch of luxury to any space. Thickness: 3/4" Perfect for Use in Bathroom, Shower Curbs, Backsplash, Jambs, Window Sill and floor Transitions. Elevate the style of your interior spaces with our Polished Black Granite Threshold. Crafted from high-quality natural granite, this threshold not only adds a touch of timeless elegance, but also offers exceptional durability for years of worry-free use.