Description Proline brings the popular look of slate to the decorative concrete world. The ever-classic Ashlar Stone look dates as far back as the 12th century and is found in most western architecture. We offer a variety of background textures, including this classic Blue Stone. This stamp consists of a 2-part, with an A and B stamp. Color-coded to reduce repeats, these quality mats are both heavy duty and tight fitting for a perfectly balanced fit. Additionally, we offer the Grand Blue Stone Ashlar Package that includes the Proline Recommended Stamping Tools and a selection of Accessories needed for your project at a package savings.