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Lennox PartsPlus was founded with one simple mission: to be the first choice for HVAC contractors looking for reliable equipment, parts and service. Lennox PartsPlus, located at 4 East College Dr. in Arlington Heights, offers a complete selection of reliable residential and light commercial HVAC equipment, universal parts, indoor air quality products, repair and installation accessories, plus professional service and support.

Diatest Gages & Tools, located in Arlington Heights, IL, specializes in precision measurement solutions, offering a wide range of products including analog and digital indicators, plug gauges, and gear gauging instruments. With a commitment to quality, the company provides metrology services and calibration options in compliance with recognized quality standards. Their extensive product lineup features tools for dynamic in-process measurement, as well as accessories for simultaneous gauging and automated measurement solutions. Diatest Gages & Tools strives to support various industries with innovative measurement technology and expert services tailored to meet diverse measurement needs. Generated from the website

Founded in 1983, Hommer Tool & Mfg Inc. is one of the leading manufacturers of custom components for plastic injection molds and automotive die castings in the United States. Based in Arlington Heights, Ill., the firm produces square and round precision mold components, including cavity components, custom cores, rotating cores, custom core pins, thin-walled ejector sleeves, complete stack-up tooling and cavity and core blocks. Other components supplied comprise out-of-round tooling, brake reliners and die cast tooling. Hommer Tool & Mfg Inc. serves multiple industries, including medical, dental, pharmaceutical, consumer product packaging, industrial and automotive.