We got you covered™ with manhole rings & grates of cast gray or ductile iron. Standard manhole sizes and styles are stock items. ADA pedestrian style and bolted grates may be available on special orders. Open areas listed in grate descriptions (flow data must be calculated by a qualified engineer) Beware of poor quality imports, always insist on products made in the USA. Please use the Contact Form or call us to request info & submittal sheets. 1-800-258-2278 Toll Free (972) 263-1360 DFW Local.