Bass & Hays® inlet rings and covers– cast gray or ductile iron. Most standard sizes and styles are stock items. Non-standard sizes, styles, and special lettering may be available on special orders. Inlet covers are typically not traffic rated and are used in the curb or sidewalk area, not in the street, although some styles may be used in either situation. Check individual items for traffic rating & ASTM data. Please use the Contact Form or call us to request info & submittal sheets. 1-800-258-2278 Toll Free (972) 263-1360 DFW Local.