Maruichi Leavitt Pipe & Tube has been manufacturing quality steel tubing products for 65 years. Headquartered in Chicago, IL, our 44 acre campus includes two facilities with manufacturing, warehouse, and office space. Maruichi Leavitt is an industry leader with one of the broadest size ranges offering: ASTM A500 Structural Tubing (Steel HSS) ASTM A513 Mechanical Tubing HI-Y 50 Structural Pipe Size Tubing ASTM A53 Standard Pipe Maruichi Leavitt is known throughout the industry as "The Tube People". Our employees pride themselves on providing quality tubing and unparalleled customer service. And with our commitment to "Investment, Innovation, Integrity" Maruichi Leavitt will remain an industry leader for generations to come.