Bass & Hays® manhole rings and covers– cast gray iron, ductile iron or fiber reinforced composite. All standard types, sizes & styles are stock items. Riser rings and accessories, all stock items. Standard items come with a wide variety of lettering & LOGOs. Special lettering & LOGOs may be available on special orders. 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.