Front. Hub & rotor. Left.E250 & 350. Right.E250 & 350. w/2 wheel ABS. w/4 wheel ABS. w/single rear wheel. A single disc Brake Rotor. Disc Brake Rotor and Hub Assembly. Includes: Inner & Outer Bearing Races. Single Rear Wheels. Under GVW 8,500 Lbs. AND. Assembly - Wheel. Seat Back Frame.