MIFAB® C1100-XR-4 series Special Duty Load Rated Cleanout Top. Load Rated Cover- over 10,000 lbs. Ductile Iron Cover – ½” thick with no recesses around the edges. Will not crack or dish when forklifts drive over it. Threads into MIFAB® A1 and A4 bodies. The perfect cleanout for the industrial warehouse environment.