MSI's product line includes an extensive offering of Granite , Quartz , Porcelain , Luxury Vinyl flooring , Slate , Marble , Travertine , Sandstone , Limestone , Quartzite , onyx , stacked stone and pavers imported from over 36 countries on six continents. Summary: The Sales Representative is responsible for driving the growth and development of sales and margins for MSI's hardscape product lines within retailer and dealer networks in an assigned geographic territory.