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 Customer Service Representative (CSR) is an on-site role responsible for engaging with customers through multiple channels, including phone, email, and in-person interactions.