Specialty Materials, Inc. (SMI) in Lowell, MA is the world's leading supplier of the highest quality boron and silicon carbide fiber products and advanced composite materials. SMI fibers and advanced composite materials provide unique solutions to engineers and manufacturers in a variety of areas, including structural integrity and controlled thermal expansion. All of SMI's advanced materials and composites are manufactured to aerospace tolerances by tight process control with complete traceability through meticulous record keeping that traces each product from our starting raw materials to our finished products.