We are a leading national distributor and direct marketer of broad-line maintenance, repair and operations ("MRO") products. We have one operating segment, the distribution of MRO products into the facilities maintenance end-market. We stock approximately 100,000 MRO products in the following categories: janitorial and sanitation ("JanSan"); plumbing; hardware, tools and fixtures; heating, ventilation and air conditioning ("HVAC"); electrical and lighting; appliances and parts; security and safety; and other miscellaneous maintenance products. Our products are primarily used for the repair, maintenance, remodeling, and refurbishment of non-industrial and residential facilities.
Our diverse facilities maintenance customer base includes institutions, such as educational, lodging, health care, and government facilities; multi-family housing, such as apartment complexes; and residential, such as professional contractors, and plumbing and hardware retailers. Our customers range in size from individual contractors and independent hardware stores to apartment management companies and national purchasing groups.
We market and sell our products primarily through fourteen distinct and targeted brands, each of which is recognized in the facilities maintenance markets they serve for providing quality products at competitive prices with reliable same-day or next-day delivery. The AmSan®, JanPak℠, CleanSource®, Sexauer®, and Trayco® brands generally serve our institutional facilities customers; the Wilmar® and Maintenance USA® brands generally serve our multi-family housing facilities customers; and the Barnett®, Copperfield®, U.S. Lock®, SunStar®, Hardware Express®, Leran℠ and AF Lighting® brands generally serve our residential facilities customers. Our multi-brand operating model, which we believe is unique in the industry, allows us to use a single platform to deliver tailored products and services to meet the individual needs of each respective customer group served. We reach our markets using a variety of sales channels, including a sales force of approximately 800 field sales representatives, and approximately 400 inside sales and customer service representatives, a direct marketing program consisting of catalogs and promotional flyers, brand-specific websites, a national accounts sales program, and other supply chain programs, such as vendor managed inventory.
We deliver our products through our network of 70 distribution centers and 21 professional contractor showrooms located throughout the United States, Canada and Puerto Rico, 62 vendor-managed inventory locations at large customer locations and a dedicated fleet of trucks and third-party carriers. Our broad distribution network enables us to provide reliable, next-day delivery service to approximately 98% of the U.S. population and same-day delivery service to most major metropolitan markets in the U.S.
Our information technology and logistics platforms support our major business functions, allowing us to market and sell our products at varying price points depending on the customer's service requirements. While we market our products under a variety of brands, generally our brands draw from the same inventory within common distribution centers and share associated employee and transportation costs. In addition, we have centralized marketing, purchasing and catalog production operations to support our brands. We believe that our information technology and logistics platforms also benefit our customers by allowing us to offer a broad product selection at highly competitive prices while maintaining the unique customer appeal of each of our targeted brands. Overall, we believe that our common operating platforms have enabled us to improve customer service, maintain lower operating costs, efficiently manage working capital and support our growth initiatives.