ALL NEW COMPONENTS & MATERIALSTUBES ARE GROUND TO A TRUE 3" O.D. FOR EASY BIRD CAGE INSTALLATIONFEATURES VENT, FILL, & DRAIN PLUG BUNGS5 X 5" BOLT PATTERNBILLET ALUMINUM HUBS (#601-211)COMPLETE 9" FORD REAR END ASSEMBLY INCLUDES:*HOUSING*SOLID AXLES, 28 OR 31 SPLINE (GUNDRILLED AXLE OPTION AVAILABLE)*SPINDLE NUTS & LOCK WASHERS*11.75" O.D. ROTORS, EITHER .810" OR 1.250" WIDE, WITH 8 BOLT X 7" BOLT CIRCLE*ROTOR BOLT KITS*5 X 5" BILLET ALUMINUM HUBS WITH COARSE THREAD STUDS*8 BOLT X 7" ROTOR PLATES*LIGHTWEIGHT ALUMINUM DRIVE PLATES*WHEEL BEARINGS*WHEEL SEALS*ALL NECESSARY O-RINGS & BOLTS FOR THE HUB KITS*SPINDLE SNOUT SEALS*AXLE SPACER BOLTSGUN-DRILLED AXLES ARE AVAILABLE AT AN ADDITIONAL COSTWHEN ORDERING, PLEASE SPECIFY IF YOU WANT 28 OR 31 SPLINE AXLES, AS WELL AS IF YOU WANT 1/8" OR 3/16" WALL THICKNESS ON THE REAR END TUBESALSO, PLEASE SPECIFY THE DESIRED LENGTH FOR THE REAR ENDLENGTH OF THE REAR END IS MEASURED FROM THE LEFT DRIVE PLATE FACE TO THE RIGHT DRIVE PLATE FACE, IN OTHER WORDS, FROM WHERE THE WHEEL BOLTS ON TO WHERE THE WHEEL BOLTS ONALSO PLEASE SPECIFY IF YOU WANT THE HOUSING CENTERED (WHERE THE DIMENSIONS ON BOTH SIDES OF THE PINOIN ARE THE SAME) OR OFFSETIF YOU WANT AN ODD LENGTH OR AN ODD OFFSET, THERE IS A CHANCE THE TUBES MIGHT NOT BE GROUND, BUT THIS IS A RARE OCCASION