We got you covered™ with reversible rings & grates of cast gray or ductile iron. Reversible rings may be used as top or bottom flanged. H-20 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 on special orders. Open areas listed in grate descriptions (flow data must be calculated by a professional qualified engineer) Specify genuine American made quality products from Bass & Hays! Please use the Contact Form or call us to request info & submittal sheets. 1-800-258-2278 Toll Free (972) 263-1360 DFW Local.