2006 Dana 21060S, Truck Delivery, Axle Housings (Rear), Fits to: International 4400, (Used) 2006 International 4400, DIFFERENTIAL HOUSING ONLY- Part Number: 511224, Serial Number: HN02030330, Make: Spicer, Model: 21060S, Ratio: 5.57, Capacity: 21,000 Lbs, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921, Serial# HN02030330, Casting# HN02030330, Hub Bolts 10 1HTMKAAN56H319077