Wellman Automotive Products Ltd., with headquarters in Shelbyville U.S.A have been at the forefront of Diesel Glow Plug and Electrical Heating Elements Technology for over 50 years. They are recognized as a leader in the industry with a client base that includes some of the leading brand names in the Diesel glow plug Aftermarket. They also manufacture for OEM customers such as Caterpillar Tractor & International Harvester Company. Glowplugs Direct (GPD) have recently acquired the European manufacuting facility and are continuing to manufacture the Wellman Brand.