We got you covered™ with pipe rings & grates in cast gray or ductile iron. Reversible rings may be used as top or bottom flanged. Traffic rated when properly installed in reinforced concrete. All sizes & styles are available. Contact us to request sizes not listed. Solid covers & ADA pedestrian style grates may be available. Check individual items for traffic rating & ASTM data. Open areas are listed in the 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.