Concrete Specialties Company manufactures precast concrete manhole structures for sanitary, storm, and water main applications. In diameters from 24″ to 144″, these products are built to ASTM standards and comply with State and Local specifications. Concrete Specialties Company produces reinforced concrete pipe from 10″ through 144″ diameters. The pipe is classified to meet appropriate applications of use. We also manufacture box culvert for sizes as large as 12 foot by 12 foot.