We are a vertically integrated, advanced materials provider specializing in monocrystalline sapphire for applications in optical and industrial systems. We design, assemble and maintain our own proprietary crystal growth furnaces to grow high-purity, low-stress, ultra-low-defect-density sapphire crystals. We use our proprietary crystal growth technology to produce high-quality sapphire products to meet our customers' exacting specifications. Sapphire is a desirable material for high-performance applications due to its hardness and strength, transparency in the visible and infrared spectrum, thermal conductivity, thermal shock resistance, abrasion resistance, high melting point and chemical inertness. As a result, it is ideally suited for extreme environments in a range of industries where material durability is just as important as optical clarity. We believe that we continue to have a reputation as one of the highest quality sapphire producers in the market. We provide optical and industrial sapphire products in various shapes and sizes, including round and rectangular windows and blanks, domes, tubes and rods.
Historically, we have also provided sapphire products to the LED and mobile device markets, which are the largest markets for sapphire. However, given competitive pressures in those markets, in the fourth quarter of 2016 we announced our decision to limit our focus to the optical and industrial sapphire markets and exit the LED market. Following this decision, we developed a plan to close our Malaysia facility and scale down and consolidate our remaining operations in the U.S. In 2017 and 2018, we completed individual sales and held auctions for assets located in Malaysia and at each of our U.S. properties, resulting in the sale of certain of our excess equipment and consumable assets. We continue to seek buyers for a few pieces of our remaining unsold Malaysia equipment. In September 2018, we completed the sale of our manufacturing and office facility located in Batavia, Illinois. We are pursuing the sale of our parcel of land in Batavia, Illinois, and the sale or lease of our 65,000 square-foot manufacturing facility in Penang, Malaysia. The timing on the sale or lease of this real estate is difficult to predict.
We manage direct sales, grow and fabricate sapphire parts and ship from our Bensenville, Illinois, facility. Previously, we leased this property, and it served as the headquarters of our operations and one of our growth facilities. In the third quarter of 2018, we vacated our leased Franklin Park, Illinois, facility due to the expiration of our lease. In September 2018, we completed the purchase of our Bensenville property and consolidated all of our operations into this facility.