We got you covered™ with TXDOT standard specification 30″ bolted  manhole rings & covers. Cast gray or ductile iron, standard lettering & LOGOs. Stock items. Special lettering or LOGOs may be available on special orders. Check individual items for traffic rating & ASTM data. Beware of poor quality imported imitations, always insist on genuine made in USA products. Please use the Contact Form or call us to request info & submittal sheets. 1-800-258-2278 Toll Free (972) 263-1360 DFW Local.