Tube Products Incorporate manufactures Equal and Unequal Tee. Tube Products Incorporate is an ISO 9001:2008 certified company. The company also manufactures and supplies carbon steel, stainless steel and alloy steel pipe fittings, flanges, piping spools and bulk pipes and plates. The Equal and Unequal Tee are made of alloy steel, cast iron and stainless steel. The Equal and Unequal Tee have high strength. These Equal and Unequal Tee are available in hot forming sizes ranging from 20" NB - 24" NB and cold forming sizes ranging from 2" NB - 18" NB.